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Question

The second law of thermodynamics implies that the coefficient of performance of a refrigerator must be what?

A
less than 1
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B
less than or equal to 1
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C
greater than or equal to 1
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D
finite
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E
greater than 0
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Solution

The correct option is E greater than 0
The second law of thermodynamics claims that it is impossible for heat to spontaneously flow from a cold body to a hot body, but it can move in that way if some form of work is done.
So, work must be greater than zero, but that means the coefficient of performance must be greater than zero

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