We wrapped up a discussion on the mixing of ideal gases by exploring how the mixing is driven by entropic effects. Since there is no chemical interactions in the case of ideal systems, the enthalpy of mixing is zero. Finally, we began our exploration of chemical equilibrium in reactions by looking at how the free energy changed with the reaction progress.

Summary - Slides - Homework 6

We took a long look at how you come up with the expression for the chemical potential of an ideal gas. This lead us to consider the mixing of ideal gases, which is completely driven by entropy.

Summary - Slides - Exam 1 Model Solutions

Raw scores for Exam 1 have been posted on Blackboard. I will hand back the exams on Monday in class. Solutions will be available within a few days on the blog.

We discussed some important relationships obtained when considering our new thermodynamic function G. We explored an example of applying G to a situation involving surface work in determining when spontaneous wetting will occur. We also introduced a new concept, chemical potential, for considering chemical work.

Summary - Slides