An inventor has built an engine X and claims that its efficiency x is greater than the
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An inventor has built an engine X and claims that its efficiency εx is greater than the efficiency e of an ideal engine operating between the same two temperatures. Suppose you couple engine X to an ideal refrigerator (Figure a) and adjust the cycle of engine X so that the work per cycle it provides equals the work per cycle required by the ideal refrigerator. Treat this combination as a single unit and show that if the inventor's claim were true (if εX > ε) the combined unit would act as a perfect refrigerator (Figure b), transferring energy as heat from the low-temperature reservoir to the high-temperature reservoir without the need for work.
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Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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