1. A cylinder fitted with a piston contains ammonia at 120 F, 20% quality with a volume of 60 in.3. The ammonia expands slowly, and during this process heat is transferred to maintain a constant temperature. The process continues until all the liquid is gone. Determine the work and heat transfer for this process.
2. A 1-lb mass of water at 600 F expands against a piston in a cylinder until it reaches ambient pressure, 14.7 lbf /in.2, at which point the water has a quality of 90%. It may be assumed that the expansion is reversible and adiabatic.
a. What was the initial pressure in the cylinder?
b. How much work is done by the water?