The figure shows a process $AB$ undergone by $2$ moles of an ideal diatomic gas. The process $AB$ is in such a way that $VT =$ constant. $T_1 = 300 K $and $T_2 = 500 K$ ( $R = $ gas constant)
AThe molar heat capacity of gas in the process $A \rightarrow B$ is $5\frac{R}{2} J/mol-K$
BThe molar heat capacity of gas in the process $A \rightarrow B$ is $R J/mol-K$
$W=\left[\frac{n R \Delta T}{(-x)}\right]=\frac{2 R \times 200}{(1-2)}=-400 R$
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