Bonus question:  3.37 - Chemical potential of monatomic ideal gas with gravity
3.38 - Chemical potential and partial pressures of gas mixture
4.1 - Ideal gas with rectangular PV cycle
4.2 - Steam power plant efficiency
4.5 - Carnot cycle efficiency
4.8 - What you can't do with a fridge
4.11 - Coefficient of performance
4.17 - If you had a COP better than ideal, you would violate the second law