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

1. Introduction
2. Review Of General Chemistry 1
3. Intermolecular Forces And Phases Of Matter
4. Phase Change Calculations
5. Phase Changes I - Vapor Pressure
6. Phase Changes II - Phase Diagrams
7. Crystal Lattices of Solid Structures
8. Solution Concentrations
9. Solution Formation
10. Solubility of a Solute
11. The Colligative Properties Of Solutions
12. The Rate Of A Chemical Reaction
13. The Differential Rate Law
14. The Integrated Rate Law
15. Rate, Temperature And The Arrhenius Equation

This collection of 15 lectures with Prof. Tibbitt a community college in Hawaii takes you through all the fundamentals of general chemistry covered in college. His lectures are presented in a blackboard, with colorful and beautiful calligraphy.