Which of the following forbids $Q_{2} = 0$ for a heat engine?

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Kelvin-Planck statement of second law of thermodynamics

Carnot cycle.

Clausius statement of second law of thermodynamics.

First law of thermodynamics.

answer is A.

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Detailed Solution

: Kelvin-Planck statement of second law of thermodynamics states 'No process is possible whose sole result is the absorption of heat from a reservoir and the complete conversion of the heat into work. The following is forbidden.

$Q_{1} = W$ , for a heat engine

But for a heat engine, $W = Q_{1} - Q_{2} s o Q_{2} = 0$ is forbidden

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