Chapter 5:    5.83 (3rd edition: ??)

Chapter 6:    6.4, 6.7, 6.52, 6.53, 6.55, 6.58, 6.67 (3rd edition: ??)

Hints/comments:

6.7) note that aragonite and calcite are both forms of CaCO₃

6.55) remember that the temperature dependence of G (or Delta_G) at constant P is equal to -S (or -Delta_S). (In this problem, first find Delta_H then Delta_S)