(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

Taking the engine to be a Carnot engine,

## \eta = \frac { T_h – T_c } {T_h} = \frac { W} {Q_h} ## .....(1)

## Q_h = C(T_h – T_f) .....(2)

\\ Q_c = C(T_f – T_c) .....(3)

\\ W = Q_h – Q_c = C(T_h + T_c – 2 T_f) ## .....(4)

Solving the above equations,

## T_f = \frac { 2T_c T_h }{T_h +T_c} ## .....(5)

This solution does not lead me to any of the given option.

Is this correct?

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# Homework Help: Maximum work done by a Carnot engine

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