Question Stem
For the reaction, $$X(s) \rightleftharpoons Y(s) + Z(g)$$, the plot of $$\ln \frac{p_z}{p^{\ominus}}$$ Versus $$\frac{10^4}{T}$$ is given below (in solid line), where $$p_z$$ is the pressure (in bar) of the gas Z at temperature T and $$p^{\ominus} = 1$$ bar.

(Given, $$\frac{d(\ln K)}{d\left(\frac{1}{T}\right)} = -\frac{\triangle H^{\ominus}}{R}$$, where the equilibrium constant, $$K = \frac{p_z}{p^{\ominus}}$$ and the gas constant, R = 8.314 J K$$^-1$$ mol$$^-1$$)