An ideal gas heat engine operates in a Carnot cycle between $227^o C$ and $127^o C$. It absorbs $6\,kcal$ at the higher temperature. The amount of heat (in $kcal$) converted into work is equal to
AIPMT 2003, Medium
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(c) Efficiency of a carnot engine is given by $\eta = 1 - \frac{{{T_2}}}{{{T_1}}}$
or $\frac{W}{Q} = 1 - \frac{{{T_2}}}{{{T_1}}}$==> $\frac{W}{6} = 1 - \frac{{(273 + 127)}}{{(273 + 227)}}$==> $W = 1.2\,k\,cal$
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