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2nd Law of Thermodynamics

A heat engine...

Question

A heat engine absorbs $Q_{1}$ heat from hot reservoir and work produced by engine is $W$ , then:

Q_{1}

is always

= W

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only in some special cases

Q_{1} = W

otherwise

Q_{1}

is greater than

W

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Q_{1}

is always less than

W

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Q_{1}

is always greater than

W

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Solution

The correct option is D $Q_{1}$ is always greater than $W$
In a heat engine , if $Q_{1}$ is the heat absorbed from reservoir , $W$ be the work done by engine and let $Q_{2}$ be the heat given to sink , then by the first law of thermodynamics
$Q_{1} - Q_{2} = W$ (internal energy $d U = 0$ for cyclic process)
this equation gives that $Q_{1}$ is always greater than $W$ .

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Similar questions

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Q_{2}

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η

and the work done is

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Q. In which process in a Carnot's heat engine, heat

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Q_{1}

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\frac{Q_{1} Q_{2}}{4 π ϵ_{0} d^{2}}

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and rejects heat to a sink at a temperature of

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A heat engine absorbs Q1 heat from hot reservoir and work produced by engine is W, then:

A heat engine absorbs $Q_{1}$ heat from hot reservoir and work produced by engine is $W$ , then: