Problem
1. A cylinder fitted with a frictionless piston contains 5 kg of superheated R-134a vapor at 1000 kPa and 140?C. The setup is cooled at constant pressure until the R-134a reaches a quality of 25%. Calculate the work done in the process.
2. A piston/cylinder contains 2 kg of water at 20?C with a volume of 0.1 m3. By mistake someone locks the piston, preventing it from moving while we heat the water to saturated vapor. Find the final temperature and volume and the process work.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.