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Calculate the irreversibility for the  air is at 300 kPa, 17°C with a volume of 0.25 m3, while at the stops V = 1 m3. An air line, 500 kPa, 600 K, is connected by a valve that is then opened until a final inside pressure of 400 kPa is reached, at which point T = 350 K. assuming that heat transfer is with the surroundings at 17°C. 

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C.V. Cylinder volume out to To = 17°C

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