Chapter 6, Problem 33E

A sample of gaseous ${\text{PCl}}_{\text{5}}$ was introduced into an evacuatedflask so that the pressure of pure ${\text{PCl}}_{\text{5}}$ would be0.50 atm at 523 K. However, ${\text{PCl}}_{\text{5}}$ decomposes to gaseous ${\text{PCl}}_{\text{3}}$ and ${\text{Cl}}_{\text{2}}$ , and the actual pressure in the flaskwas found to be 0.84 atm. Calculate $K_{\text{p}}$ for the decompositionreaction ${\text{PCl}}_{\text{5}}\left(g\right)\rightleftharpoons {\text{PCl}}_3\left(g\right)+{\text{Cl}}_{\text{2}}\left(g\right)$ at 523 K. Also calculate K at this temperature.