A well-insulated piston-cylinder assembly containing 5 kg of water vapor, initially at 540 C and 60 bar, undergoes a reversible expansion to 20 bar. The surroundings are at 1 bar and 25 C (a) What is the entropy change of the system, surroundings, and universe for this process? (b) What is the final temperature of water? (c) What is the work interaction for this process? (d) What is the final volume of the system?
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