A Refrigerator Keeps Food in the Freezer Portion at −15°C

question 69

Multiple Choice

A refrigerator keeps food in the freezer portion at −15°C and dumps excess heat into the kitchen, whose temperature is 22°C. If the refrigerator has half the coefficient of performance of an ideal reversible refrigerator, and if its motor consumes 250 W of power, what is the rate of heat flow out of the freezer portion of the refrigerator?

• A) 340 W
• B) 870 W
• C) 1,100 W
• D) 630 W

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