8-151 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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