A refrigerator requires 25 J of work and exhausts 45 J of heat per cycle. What...

Question

Question

A refrigerator requires 25 J of work and exhausts 45 J of heat per cycle.

What is the refrigerator's coefficient of performance?

Answer 1

Answer #1

Work required by the refrigerator per cycle = W = 25 J

Heat exhausted by the refrigerator per cycle = Q_h = 45 J

Heat removed from within the refrigerator = Q_c

Q_h = Q_c + W

45 = Q_c + 25

Q_c = 20 J

Coefficient of performance of the refrigerator = COP

COP = 0.8

Coefficient of performance of the refrigerator = 0.8

Answer 2

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