A well-insulated piston-cylinder assembly containing 5 kg ofwater vapor,
initially at 540 C and 60 bar, undergoes a reversible expansion to20 bar. The surroundings are at 1 bar and 25 C

(a) What is the entropy change of the system, surroundings, anduniverse 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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Patrina SchowalterLv2

23 Mar 2019

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