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A piston cylinder device contains 3 lbm of refrigerant 12 at 120 psia and 120...

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A piston cylinder device contains 3 lbm of refrigerant 12 at 120 psia and 120 F The refrigerant is cooled at constant pressure until it exists as a compressed liquid at 90 F If the temperature of the surroundings is 70 F determine A the work added to the refrigerant and B heat transfer removed from the system Also determine C the total entropy change of the system

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