Copyright Information: Penner, Reginald Thermodynamics and Chemical Dynamics 131C (UCI OpenCourseWare: University of California, Irvine), http://ocw.uci.edu/courses/chem_131c_thermodynamics_and_chem... [January 28, 2015]. License: Creative Commons Attribution-ShareAlike 3.0 United States License. (http://creativecommons.org/licenses/by-sa/3.0/us/deed.en_US).
Slide Information 00:06- Lindemann-Hinshelwood 01:22- Announcements 3:19- Today: Steady-State Approximation, Lindemann-Hinshelwood Mechanism 03:46- The Steady-State Approximation 07:58- Graph: Concentration, Time 08:25- Solve the Simplified Equations that Result 09:37- How Does This Compare with the Exact Solution? 10:25- How Well the Steady State Works- Graph of Concentration, Time 11:18- The Steady-State Approximation is Breaking Down 12:30- Example: Apply the Steady-State Approximation to the Following Reaction Mechanism 18:06- Simplifying Further 21:26- Two Limiting Experimentally Observed Rate Laws 24:40- Most Elementary Reactions are Either Unimolecular or Biomolecular 25:44- Biomolecular Reactions Have an Obvious Mechanism in the Gas Phase 26:17- Transition State Graph 26:42- But How Does a Unimolecular Reaction Occur? 27:06- Unomolecular Reactions- Isomerization 27:31- Unimolecular Reacions- Decomposition Reactions 28:05- How Does this Happen? The Lindemann-Hinshelwood Mechanism Provides an Explanation 30:10- Applying the Steady-Sate Approximation to the Lindemann-Hinshelwood Mechanism 31:10- The Strong Collision Assumption 13:35- Can We Apply the Steady-State Approximation to the Mechanism? 34:14- What Does it Predict? 37:26- What Does This Mean Mechanistically? 38:04- The Kinetics of Pressure-Dependent Reactions 41:19- We Can Write the LH Rate in This Form 43:29- Does it Work? Plot 44:09- It Doesn't Work So Well 45:44- Reactions Where a Pre-Equilibrium is Established 47:45- Test the Lindemann-Hinshelwood Mechanism for the Isomerization of Cyclopropane 49:02- The Data is Not Convincing- Plot 50:18- Use the Steady State Approximation Again
In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates are measured and calculated from molecular properties. Topics covered include: Energy, entropy, and the thermodynamic potentials; Chemical equilibrium; and Chemical kinetics.
Chemistry Dept. | Physical Sciences Sch. | University of California, Irvine