懂英文进.The engine operates in a cycle between temperatures 700k and 400k.the heat input to the engine during each cycle is 2800J.What is the maximum possible work done by the engine in each cycle?

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懂英文进.The engine operates in a cycle between temperatures 700k and 400k.the heat input to the engine during each cycle is 2800J.What is the maximum possible work done by the engine in each cycle?
懂英文进.
The engine operates in a cycle between temperatures 700k and 400k.the heat input to the engine during each cycle is 2800J.What is the maximum possible work done by the engine in each cycle?

懂英文进.The engine operates in a cycle between temperatures 700k and 400k.the heat input to the engine during each cycle is 2800J.What is the maximum possible work done by the engine in each cycle?
thermal efficiency = 1- (T cold / T hot)
= 1 - 400/700
= 0.43
thermal efficiency = W / Qhot
0.43= W / 2800 J
w = 1204 J