Question

According to Clausius statement of the second law of thermodynamics, the coefficient of performance of a refrigerator is never

• A. infinity
• B. greater than unity
• C. less than unity
• D. unity

Answer 1

The correct option is A infinity

${\left(COP\right)}_R=\frac{Q_2}{W}$

As without work input, heat cannot be transferred from low temperature to high temperature.

So, W can never be zero
Hence COP can never be infinite.