A refrigerator with coefficient of performance 0 . 25 releases 250 J of heat to a hot reservoir. The work done on the working substance is

Question

A refrigerator with coefficient of performance 0 . 25 releases 250 J of heat to a hot reservoir. The work done on the working substance is, 100 3 J, 150 J, 200 J, 50 J

MARKS App · Accepted Answer

Given, Coefficient of performance, Q 2 W = 0 . 25 = 1 4 ⇒ Q 2 = W 4 Q 1 = Q 2 + W ⇒ Q 1 = W 4 + W ⇒ W = 250 4 5 = 200 J

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