The work done during reversible isothermal expansion of one mole of hydrogen gas at $25^{\circ} \mat

Question

The work done during reversible isothermal expansion of one mole of hydrogen gas at $25^{\circ} \mathrm{C}$ from pressure of 20 atmosphere to 10 atmosphere is : (Given $R=2.0 \mathrm{cal} \mathrm{K}^{-1} \mathrm{~mol}^{-1}$ )

Professor PC Thomas Classes · Answer

\begin{aligned} & 	ext {  (b) }: w=-2.303 n R T \log \frac{V_2}{V_1} \ & 	ext { or } w=-2.303 n R T \log \frac{P_1}{P_2} \ & =-2.303 	imes 1 	imes 2 	imes 298 	imes \log \frac{20}{10}=-413.14 	ext { calories } \end{aligned}