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Q. One mole of an ideal gas at an initial temperature of $TK$ does $6R$ joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is $5/3 ,$ the final temperature of gas will be

NTA AbhyasNTA Abhyas 2020

Solution:

$W=\frac{R \left(T_{i} - T_{f}\right)}{\gamma - 1}\Rightarrow 6R=\frac{R \left(T - T_{f}\right)}{\left(\frac{5}{3} - 1\right)}\Rightarrow T_{f}=\left(\right.T-4\left.\right)K$