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| Subject: | Chemistry |
| Topic: | General Chemistry |
| Views: | 24,478 |
Instructor
Name
Jeffrey A Tibbitt
General Chemistry II with Jeffrey Tibbitt
Video Lectures
Displaying all 15 video lectures.
Lecture 1 Play Video |
Introduction In this introductory lecture, the purpose for doing this video course is explained and the topics that will be covered are outlined. The topics coverered are: Phases of Matter (Phases, Phase Changes, Phase Diagrams, Crystal Lattices of Solid Structures), Solutions and Colligative Properties, Reaction Rate (Chemical Kinetics), Chemical Equilibria (The Equlibrium Constant for General, Acid-Base, Buffers and Solubility Equilibria), Thermochemistry (Energy, Enthalpy, Entropy, Free Energy, Spontaneous Reactions and Spontaneity), Electrochemistry. There will be special topics of interest here and there (e.g. Proteins). Conclusion is filmed on location at the front entrance to Gallaudet University in Washington D.C. Video transcript is located here: https://drive.google.com/file/d/0B8Rdl1tP83ZgQ1JNVldTdXRpVTQ... General Chemistry II - Lecture 0 - Introduction In short, I'm doing this course because I love teaching general chemistry. Also, I want to provide clear and concise lectures are fully captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Videos will normally begin with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i |
Lecture 2 Play Video |
Review Of General Chemistry 1 In this review lecture, the main topics from first semester general chemistry are overviewed: Phases of Matter, Measurements, Numbers, Dimensional Analysis, Atoms, Molecules, Ions, Chemical Reactions, Stoichiometry, Gases, Thermochemistry, Atomic Structure, Electron Configurations, Periodic Table, Lewis Structures, Molecular Shapes, Polar Molecules. The following topics are looked at more closely than the rest: Dimensional Analysis, Chemical Reactions, Molecular Shapes. General Chemistry II - Lecture 1 - Review of General Chemistry I Introduction is filmed on location at the Lincoln Memorial in Washington D.C. These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i |
Lecture 3 Play Video |
Intermolecular Forces And Phases Of Matter This second lecture is actually the first that covers new material for second semester. First, we take a look at phases of matter, and the differences between each phase by looking at distinguishing properties (Density, Shape, Compressibility, Intermolecular Force strength). Solids and Liquids have intermolecular forces that hold the particles close together. We discuss temperature in terms of molecular motion, and describe phase changes (melting/boiling) as occuring because the molecules are literally shaking too much and result in the interactions being broken. We also discuss pressure effects on phase boiling a little bit. We discuss the direct relationship between intermolecular interactions and melting and boiling points. Then we get into the 3 main types of intermolecular interactions: dispersion (also called temporary dipoles or van der Waals), dipole-dipole and hydrogen bond. We do several examples, including the boiling points of the alkanes. These examples require the lewis structure and molecular shape to be known. Introduction is filmed on location at Waikiki Beach in Honolulu, HI. General Chemistry II - Lecture 2 - Intermolecular Forces And Phases Of Matter These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i |
Lecture 4 Play Video |
Phase Change Calculations This lecture deals phase changes that result from heat input. We look at the energy cost to melt a solid (heat of fusion) or boil a liquid (heat of vaporization). We also recall from first semester the energy cost to change the temperature of a substance when no phase change occurs (specific heat capacity). A classic example calculation is done - it involves calculating the energy cost to raise the temperature of water from -25 degrees (cold ice) up to 125 degrees (hot gas), which means that it must melt and boil along the way. The calculation is laid out clearly, with all 5 energy terms being reported in kilojoules with the proper number of significant figures, and those terms added up to give the total heat cost. Introduction is filmed on location at Electic Beach on the southern most part of Wai'anae, HI. General Chemistry II - Lecture 3 - Phase Change Calculations These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i |
Lecture 5 Play Video |
Phase Changes I - Vapor Pressure In this lecture, the vapor pressure is described in good detail. First, the mechanism behind heat flow is described, then particle motion is discussed in what I like to term 'The 3-Dimensional Billiard Ball Game'. This leads naturally to the Boltzmann Distribution of particle velocities, and on to how vapor pressure occurs. We use the Clapyron equation to see how vapor pressure depends on temperature and the enthalpy of vaporization. We also use the Clapyron equation (in both exponential and linear forms) to plot a set of pressure, temperature data for water. Finally, boiling is discussed, as well as the dependence of boiling temperature on elevation. Introduction is filmed on location at Shark's Cove on the north shore of O'ahu. General Chemistry II - Lecture 4 - Phase Changes I - Vapor Pressure These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i |
Lecture 6 Play Video |
Phase Changes II - Phase Diagrams Phase Diagrams are graphical representations of the phases that a substance takes under different temperature/pressure conditions. In this lecture we first reiterate our basic understanding of the 3 phases of matter (solid, liquid, gas), as well as the 6 possible phase transitions that can occur (melting, freezing, vaporization, condensation, sublimation, deposition). We then describe what a phase diagram of a general substance tells us (regions represent phases and lines represent phase transitions), and we also indicate the normal melting and boiling points, as well as the triple point and critical point. We then compare the phase diagrams of water and carbon dioxide. Introduction is filmed on location at the entrance to Laniakea overlooking Kailua Bay in Kailua, HI. General Chemistry II - Lecture 5 - Phase Changes II - Phase Diagrams These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i |
Lecture 7 Play Video |
Crystal Lattices of Solid Structures Solid crystals are nice to look at. They occur in many different colors and have very nice geometric features - long edges, smooth faces and well defined angles. It's interesting, and perhaps not surprising, that these features result from the certain (hidden) structural patterns on the molecular and atomic scale. These patterns that occur in the structure of particles are actually made up of small repeating sections, called unit cells. In this lecture, we take a look at a representative pattern called the cubic arrangement. In particular, we look at the 3 different types of cubic unit cells (simple cubic, body-centered cubic and face-centered cubic. We demonstrate how certain atomic-scale details of the unit cell (e.g. how particle arrangement and edge length in terms of the atomic radius) allow large-scale properties (e.g. packing efficiency and density) to be predicted. Introduction is filmed on location at Leeward Community College in Pearl City, HI. General Chemistry II - Lecture 6 - Crystal Lattices of Solid Structures These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i |
Lecture 8 Play Video |
Solution Concentrations Solutions are defined, and the difference between solvent and solute components is stated. Several examples of mixtures that are solutions are listed along with some example of mixtures that are not solutions. Electrolytes and nonelectrolytes are reviewed. Solution concentration units (molarity, molality, mole fraction, mass percent, ppm, ppb) are defined and the differences between them described. Example calculations of molarity, molality and mole fraction are done. Finally, calculations to show how to convert molarity to molality, molality to mole fraction and mole fraction to molarity are all done. Introduction is filmed on location at Gas Chambers on the North Shore of O'ahu. Surfers are Michael Clark, Corey Bohan, Sam Custin and one other local. General Chemistry II - Lecture 7 - Solution Concentrations These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i ** English Captions ** |
Lecture 9 Play Video |
Solution Formation Solutions form because of two main reasons. First, the random motion of the solute and solvent particles causes both solute and solvent to mix together. This is called the entropic effect - particles tend towards more disorganized (or mixed) configuration. Second, there are forces among the particles that can either hinder or help solutions to form. This is called the energetic effect. If solute particles are held together by weak forces and solvent particles as well, but the forces that between solute and solvent are strong, then the forces will help the solution form, and the process would be exothermic, meaning heat would be released. However, if the solute particles are held together by strong forces and the solvent as well, but the forces between solute and solvent are weak, then this acts to hinder solution formation, and extra energy in the form of heat would be required for the solution to form - the process would be endothermic. The energetic effect only comes into play when there are liquids and solids involved. It does not affect solution formation when there are only gases, because gas particles are already separated from one another. Introduction is filmed on location at Kualoa Regional Park, with Mokoli'i Island (Chinaman's Hat) in the background. General Chemistry II - Lecture 8 - Solution Formation These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i ** English Captions ** |
Lecture 10 Play Video |
Solubility of a Solute Solubility is defined as the maximum amount of solute that dissolves in a given amount of solvent. In this lecture the solubility is defined. Then several factors that affect the solubility (structure of solute/solvent, temperature, pressure, gravity) are discussed in good detail. The effect of structure and solubility is described for several types of solutions (solid/liquid, liquid/liquid, gas/liquid, solid/gas, gas/gas, solid/solid) and the role of energy and entropy in each is mentioned. The effect of temperature is described for solids dissolving in water and for gases dissolving in water. The role that entropy of solution and the enthalpy of solution plays in temperature effects is also discussed. Finally the effect of pressure on the solubility of a gas is described, and Henry's Law is stated. The effect of gravity and solubility is briefly mentioned. The introduction is filmed on location at Shark's Cove on the north shore of O'ahu. Large (warning level) surf is pounding the north shore on this day. Very dangerous swimming and surfing conditions. General Chemistry II - Lecture 9 - Solubility of a Solute These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i |
Lecture 11 Play Video |
The Colligative Properties Of Solutions These are properties that solutions have, and pure solvents do not. We discuss the following 4 colligative properties: vapor pressure lowering, boiling point elevation, freezing point depression and osmotic pressure. The reason why each property happens is explained in terms of how the solute particles ‘get in the way’. The degree to which each property changes is also calculated. Also, the difference between ionic and molecular solutes are discussed in terms of vant hoff factors. The introduction is filmed on location at the famous wave, Pipeline, on the north shore of O'ahu. Too many surfers to count. This was the day before the start of the Volcom Pipe Pro contest. Many professional surfers out there getting their fix. General Chemistry II - Lecture 10 - The Colligative Properties Of Solutions These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i ** English Captions ** |
Lecture 12 Play Video |
The Rate Of A Chemical Reaction The chemical reaction rate is discussed. The rate is defined as change in concentration divided by the change in time. The following example reaction is used - hydrogen (H2) reacts with iodine (I2) to form product hydrogen iodide (HI). Experimental concentration data (concentrations recorded after every 10 seconds) is used to calculate the average reaction rate over each 10 second interval. The relationship between the rates of change for reactants versus products are pointed out and compared with the stoichiometry of the reaction. Also, concentration is plotted versus time on a graph and the connection between rates and slopes is pointed out. Also instantaneous rates are compared with average rates. General Chemistry II - Lecture 11 - The Rate Of A Chemical Reaction These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i ** English Captions ** |
Lecture 13 Play Video |
The Differential Rate Law This lecture is dedicated to the one and only Professor Michael Reese, who helped understand the differential rate law in a much more intuitive way. The differential rate law is discussed. First we do an example which shows how the order of a reaction is determined by observing how changing reactant concentration affects the reaction rate. Then we discuss (in detail) more about what the reaction order actually means. We see that an enzyme (or protein) exhibits zero order kinetics (i.e. it has a constant rate). Nuclear decay has first order kinetics (i.e. doubling the reactant concentration doubles the rate). The collision model has second order kinetics (i.e. doubling reactant concentration quadruples the rate). Then we do a couple more examples to show how to find the entire rate law - orders, rate constant with the proper units and all. General Chemistry II - Lecture 12 - The Differential Rate Law These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i ** English Captions ** |
Lecture 14 Play Video |
The Integrated Rate Law The integrated rate law is discussed. First the zero-order integrated rate law is derived two ways - first using a simple algebraic approach and second using the power rule of calculus. Then the integrated rate law is compared with the differential rate law. Differential tells us how concentration affects the rate while integrated tells us how time affects the concentration. Next, the first order integrated rate law is derived. The algebraic derivation uses the experimentally observed fact that the half-life is constant. The calculus derivation uses the power rule again, and is much easier. Both rate laws are graphically compared again. Finally, the 2nd-order integrated rate law is derived, this time just using the power rule of calculus; no algebraic derivation is given. Then zero, first and second order reactions are summarized in one large informational slide; differential rate law, integrated rate law, half-life, plot of rate vs concentration and plot of concentration vs time, natural log of concentration vs time or inverse concentration vs time are all included. Finally an example shows how to determine the order of a reaction from experimental data by using the integrated rate law. General Chemistry II - Lecture 13 - The Integrated Rate Law These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i ** English Captions ** |
Lecture 15 Play Video |
Rate, Temperature And The Arrhenius Equation The Arrhenius Equation is discussed. In order to better discuss the different parts of this equation an example chemical reaction is looked at; the unimolecular isomerization reaction of methylisocyanide forming methylcyanide. The kintics are discussed and the reaction profile is studied. The activation energy is discussed along with how it relates to the transition state structure. The frequency factor is related to the vibrational character of the reactant molecule - the frequency of vibrations, or how often the vibrations occur. And the temperature is related to the magnitude of vibrations. The exponential factor is then related to the fraction of molecules with enough energy to overcome the activation energy barrier. The difference between the frequency factors unimolecular and bimolecular reactions is briefly discussed. Finally an example is done in which experimental data consisting of rate constants determined at different temperatures is used to determine the activation energy and frequency factor. General Chemistry II - Lecture 14 - Rate, Temperature and the Arrhenius Equation These videos are being made because I love teaching general chemistry. Also, I want to provide clear videos that are captioned for the deaf and hard-of-hearing, as well as for international students who use English as a second language (ESL). These video lectures are being used to assess such students as well as hearing students. However, any student of general chemistry should find the lectures very useful. Clear and concise explanations, colorful notes, and simple diagrams are used. All videos are uploaded under the Creative Commons license, so please feel free to use them in any way you. These videos are hard work on my part, and I enjoy making them. If you continue to watch, then you will not only learn chemistry, but also some interesting things about the state of Hawai'i. Each video normally begins with a short clip taken on location, from somewhere in the Hawaiian Islands. And if you are on the island of O'ahu or happen to visit, then please feel free to stop by Leeward Community College say hello. Enjoy and Aloha !!! JAT Jeffrey A Tibbitt, Ph.D Lecturer of Chemistry Office PS-206, (808) 455-0264 jtibbitt@hawaii.edu Leeward Community College Pearl City, Hawai'i ** English Captions ** |
