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A heat engine operates between a high temperature reservoir at TH and a low temperature reservoir at TL. Its efficiency is given by 1 − TL/TH : A. only if the working substance is an ideal gas B. only if the engine is reversible C. only if the engine is quasi-static D. only if the engine operates on a Stirling cycle E. no matter what characteristics the engine has |
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Answer» B. only if the engine is reversible |
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