At $473 \mathrm{~K}, K_c$ for the reaction, $\mathrm{PCl}_{5(g)} \rightleftharpoons \mathrm{PCl}_{3(

Question

At $473 \mathrm{~K}, K_c$ for the reaction, $\mathrm{PCl}_{5(g)} ightleftharpoons \mathrm{PCl}_{3(g)}+\mathrm{Cl}_{2(g)}$ is $8.3 	imes 10^{-3}$. What will be the value of $K_c$ for the formation of $\mathrm{PCl}_5$ at the same temperature?

Professor PC Thomas Classes · Answer

(b) : $\mathrm{PCl}_{5(g)} ightleftharpoons \mathrm{PCl}_{3(g)}+\mathrm{Cl}_{2(g)} ; K_c=\8.3 	imes 10^{-3}$ For $\mathrm{PCl}_{3(g)}+\mathrm{Cl}_{2(g)} ightleftharpoons \mathrm{PCl}_{5(g)} ;\ K_c=\frac{1}{8.3 	imes 10^{-3}}$
$ K_c=\frac{1}{8.3} 	imes 10^3=120.48 $