After a summary of some overarching thermodynamics concepts, we began to discus chemical kinetics. We looked at several ways to write the rate of a chemical reaction and the associated rate law.

Summary - Slides

We explored a more complex binary system where the liquid is nearly ideal and there is limited solid solubility.

Exam 2 was also distributed. It is due in-class on Monday and must be returned in person.

Summary - Slides - Practice Problems

We talked a bit more about ideal binary phase diagrams and the associated cooling curves. We then discussed the case of chemical interactions through the use of activity and the activity coefficient. Finally we started a discussion of a model on non-ideality, the regular solution model.

Summary - Slides

Our second exam will be a take-home exam. I will distribute the exam on Monday, November 2 and it must be returned in person at the beginning of class on Monday, November 9.

We saw how we can construct an ideal binary phase diagram (lens diagram) from our expression for the free energy of mixing of two ideal components. Our next step is to see what information this type of diagram gives us.

Solutions to Homework #7 have been posted, as well as last year’s Exam 2.

We developed the beginnings of an ideal binary phase diagram for a two component system that can exist in the solid and liquid phase.

Summary - Slides

We explored homogeneous and heterogeneous nucleation of a solid from a liquid phase.

Summary

We completed two of three practice problems and then began to explore phase transitions in a qualitative manner.

A new homework was also distributed.

Practice Problems

We derived the Clapeyron Equation to describe the coexistence curve for a single component system. This required a few assumptions which led us to the Clausius-Clapeyron Equation for the equilibrium between a condensed, pure phase and the vapor phase.

Summary - Slides

After finishing up the practice problems from last time, we took a look at phase equilibria in single component systems. This led to the construction of our first (of many) phase diagrams.

Summary - Slides