Choose the incorrect statement from the follo | vedclass

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(A) The efficiency of a heat engine is given by $\eta = 1 - \frac{T_2}{T_1}$.For $\eta = 1$ (i.e.,$100\%$ efficiency),we would require either $T_1 = \

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$S1$

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(A) The efficiency of a heat engine is given by $\eta = 1 - \frac{T_2}{T_1}$.For $\eta = 1$ (i.e.,$100\%$ efficiency),we would require either $T_1 = \infty$ or $T_2 = 0\, K$.Since a source at infinite temperature or a sink at $0\, K$ is physically unattainable,a heat engine cannot have an efficiency of $1$.Thus,the statement in $S1$ claiming that the efficiency of a heat engine can be $1$ is incorrect.$S2$ is correct as the first law is a statement of the conservation of energy.$S3$ is correct because the second law imposes restrictions on processes that the first law does not.$S4$ is a statement of the Clausius form of the second law of thermodynamics,which is correct.

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