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aks2708
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Homework Statement
During the working cycle of an engine, the heat transferred out of the system was 200kj/kg of working fluid. The internal energy also decreased by 300kj/kg of working fluid. find teh work done and state whether it is work done on the engine or by the engine.
Homework Equations
W = Q- E
The Attempt at a Solution
W = Q-E
Since heat transferred out so Q = -200
Decrease in internal energy E = -300
Work done = -200-(-300) = 100.
Please correct me if i am wrong. I am not sure if it is work done by the engine or on the engine