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(C) For an ideal gas,the equation of state is $PV = nRT$. To compare the temperatures $T_1$ and $T_2$,we can draw a line of constant pressure $(P =

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$T_1 < T_2$

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(C) For an ideal gas,the equation of state is $PV = nRT$. To compare the temperatures $T_1$ and $T_2$,we can draw a line of constant pressure $(P = 	ext{constant})$ on the $P-V$ graph. At a constant pressure,the ideal gas equation gives $V \propto T$. From the graph,for a fixed pressure,the volume corresponding to the curve $T_2$ (let it be $V_2$) is greater than the volume corresponding to the curve $T_1$ (let it be $V_1$),i.e.,$V_2 > V_1$. Since $V \propto T$ at constant pressure,$V_2 > V_1$ implies $T_2 > T_1$ or $T_1 < T_2$.

The adjoining figure shows the graph of pressure $(P)$ and volume $(V)$ of a gas at two temperatures $T_1$ and $T_2$. Which of the following inferences is correct?

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