Physics - Heat & Thermo Question with Solution | TestHub

A closed, heat-insulated vessel holds ozone at $427^{\circ }$C. The ozone later converts completely into oxygen. Forming one g-mole of ozone from oxygen needs 40 kcal. Find the final to initial pressure ratio $\frac{P_2}{P_1}$. ($M_{O_3}=48$, $M_{O_2}=32$, $C_v$ of oxygen = $5$ cal $mo{l}^{-1}$$K^{-1}$)