A refrigerator has a coefficient of performance 4.0.How much heat is exhausted to the hot reservoir when 400 kJ of heat are removed from the cold reservoir?

Question

Quizplus · Accepted Answer

The coefficient of performance is defined as the ratio of the heat removed from the cold reservoir to the work input. In this case, COP=4.0 means that for every 1 unit of work input, 4 units of heat are removed from the cold reservoir. Therefore, the work input required to remove 400 kJ of heat from the cold reservoir is 100 kJ. The total heat exhausted to the hot reservoir is the sum of the heat removed from the cold reservoir and the work input, which is 500 kJ. Hence, option A is the correct answer.

A Refrigerator Has a Coefficient of Performance 4