Question

During one cycle, a refrigerator removes 500 J from a cold reservoir and discharges 800 J to its hot reservoir. (a) What is its coefficient of performance?

a) 0.625
b) 1.0
c) 2.0
d) 0.375

Answer 1

The coefficient of performance of a refrigerator can be calculated using the equation COP = Amount of heat removed from the cold reservoir / Work done on the refrigerator.

Step-by-step explanation:

The coefficient of performance (COP) of a refrigerator is given by the equation:

COP = Amount of heat removed from the cold reservoir / Work done on the refrigerator

In this case, the refrigerator removes 500 J from the cold reservoir and does 800 J of work on the refrigerator. Therefore, the COP can be calculated as:

COP = 500 J / 800 J = 0.625

So, the coefficient of performance of the refrigerator is 0.625, and the answer choice is a) 0.625.