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Why a heat engine with 100% efficiency can never be realized in practice?

Why a heat engine with 100% efficiency can never be realized in practice?
 

Grade:11

1 Answers

DURGARAM
232 Points
6 years ago
For 100% efficiency T1 = ∞ (or) T2 = 0 k. As absolute zero and infinite temperature cannot be
realized in practice, the efficiency of a heat engine cannot have 100%. The efficiency of a heat
engine is always less than unity.
 

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