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Problem 1.8: Question: In the compression stroke of a gas engine the work done on the gas by the piston is 70 kJ/kg and the heat rejected to the cooling water is 42 kJ/kg.

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Question

In the compression stroke of a gas engine the work done on the gas by the piston is 70 kJ/kg and the heat rejected to the cooling water is 42 kJ/kg. Calculate the change of specific internal energy stating whether it is a gain or a loss.

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