Chpt4

4-1	Another T/F problem.
4-2 (a, b only)	Calculation of DS_tot, DG, and DA for two phase changes (one melting, one vaporization) and for adiabatic expansion of a perfect gas into a vacuum. Note the similarities and differences between the three quantities. Note that the difference between DG and DA is often only a few kJ/mol.
4-28	Can be done very quickly. Emphasizes a very important point.
4-29	Part a can be done very quickly. Emphasizes a very important point. Part b concerns (again) the freezing of supercooled water. The process of freezing of supercooled water illustrates many important ideas.
4-30	Another problem based on the mixing of gases, which is another classic problem in chemical thermodynamics.

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