Problems:
2.2, 2.6, 2.7
2.52
2.60
2.66

Answers:
2.2, 2.6, 2.7: No answers will be given
2.52: delta z = 5469 m
2.60: delta u = 27.92 kJ/kg
2.66: delta u = - 259.4 kJ/kg

Hints:

• Read EACH word.
• Draw some pictures (one for each state).
• Write the given information under each picture.
• Write what it is you are to find.
• Plotting the process on a p-V plot may help...
• Write write the equations you are to use (or might want to use).
• If necessary, find the phase at each state.
• PLEASE try to be organized.