$P_i, V_i$ and $P_f$, $V_f$ are initial and final pressures and volumes of a gas in a thermodynamic process respectively. If $PV^n =$ constant, then the amount of work done is
Medium
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$\mathbf{P V}^{x}=$ cons. (Polytropic process)
$W=\frac{n R \Delta T}{1-x}$
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