Two specific heats of a perfect gas are related by
CP – CV = $\dfrac{R}{J}$
CP – CV = J
CP – CV = RJ
$\dfrac{C_P + 1}{C_V}$ = 2.4 cal
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A gas expands adiabatically at constant pressure such that its temperature T α $\dfrac{1}{\sqrt{v}}$, the value of $\dfrac{C_P}{C_V}$ of the gas is