The second law of thermodynamics implies that the coefficient of performance of a refrigerator must be what? a. less than 1 b. less than or equal to 1 c. greater than or equal to 1 d. finite e. greater than 0
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Mathematically, it's expressed as: $COP = \frac{Q_c}{W}$ where $Q_c$ is the heat removed from the cold reservoir and $W$ is the work input. Show more…
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Supratim P.
Keeping the limitations imposed by the second law of thermodynamics in mind, choose the wrong statement below: (a) A heat engine cannot have a thermal efficiency of 100 percent. (b) For all reversible processes, the second-law efficiency is 100 percent. (c) The second-law efficiency of a heat engine cannot be greater than its thermal efficiency. (d) The second-law efficiency of a process is 100 percent if no entropy is generated during that process. (e) The coefficient of performance of a refrigerator can be greater than 1
Keeping the limitations imposed by the second law of thermodynamics in mind, choose the wrong statement below: (a) A heat engine cannot have a thermal efficiency of $100 \%$ (b) For all reversible processes, the second-law efficiency is $100 \%$ (c) The second-law efficiency of a heat engine cannot be greater than its thermal efficiency. (d) The second-law efficiency of a process is $100 \%$ if no entropy is generated during that process. $(e)$ The coefficient of performance of a refrigerator can be greater than 1
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