Pure `PCl_(5) ` is introduced into an evacaated chamber and to equilibrium at `247^(@)C` and 2.0 atm .The equilibrium gases mixure contains 40% choririne by volume .
Calculate `K_(p)` at `247^(@)C` for the reaction
`PCl_(5)(g)hArrPCl_(3)(G)+Cl_(2)(g)`