Answer to Question #8433 in Molecular Physics | Thermodynamics for michael

Question #8433
An engine absorbs 2000J of heat from a hot reservoir and expels 750J to a cold reservoir during each operating cycle. What is the efficiency of the engine?
1
Expert's answer
2012-04-24T07:15:40-0400
An engine absorbs 2000J of heat from a hot reservoir and expels 750J to a cold reservoir during each operating cycle. What is the efficiency of the engine?

The efficiency of the engine is the ratio between the heat expelled to a cold reservoir and the heat absorbed from a hot reservoir:

& alpha; = 750J / 2000J = 0.375.

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