An engine wastes 491 J of heat while producing 670 J of work. How much heat must be coming into the engine from a hot reservoir?

1 Answer
Shreya
Feb 20, 2018

1161 J

Explanation:

As the body wastes 491 J,i.e,rejects that amount of heat to the cold reservoir(Q_2) and performs 670 J of work(W),then the total amount of heat absorbed by the body from the hot reservoir(Q_1) would be,
Q_1=W +Q_2
Thus Q_1=670+491 OR 1161 J

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