A piston-cylinder device contains 2 kg saturated water vapor at 600 kPa. The water expands adiabatically until the final pressure is 100kPa. And 1,465 kJ work is produced. a. What is the final temperature of the water? b. What is the change in entropy of the water? c. Is this process realistic? Use a T-s diagram and the Clausius relation to explain.