a refrigerator moves energy from a cold reservoir (the inside of the refrigerato
ID: 1472845 • Letter: A
Question
a refrigerator moves energy from a cold reservoir (the inside of the refrigerator) to a hot reservoir (the kitchen), but some extra energy is required in the form of work done by some outside agent (typically a compressor motor). Just like the efficiency can be used to tell how 'good' an engine is, the Coefficient of Performance can be used to compare refrigerators. If a refrigerator requires 1.55×104 J of work to remove 5.51×104 J of energy from the inside of a refrigerator, what is the coefficient of performance of the refrigerator? 3.55 You are correct. Help: Receipt Previous Tries How much energy is transferred into the hot reservoir (ie., the kitchen)? Incorrect. Tries 9/10 Previous Tries
Explanation / Answer
Q_c = W COP
COP = Q_c/W
=5.51×104 J /1.55×104 J =3.55
energy is transferred into the hot reservoir = 7.06 * 10 ^4 J
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