Question: An engineer redesigns a heat engine and improves its thermal efficiency from 20% to 25%. (a) Does the ratio of the heat input to heat

An engineer redesigns a heat engine and improves its thermal efficiency from 20% to 25%.
(a) Does the ratio of the heat input to heat output (1) increase, (2) remain the same, or (3) decrease? Explain.
(b) What is the engine’s change in Qh/Qc?

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a To increase the efficiency the waste heat Q out should be a smaller fraction of the hea... View full answer

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