Chapter 15, Problem 15.47QP

(a) Calculate ΔG° and K_P for the following equilibrium reaction at 25°C.

PCl₅ ⇄ PCl₃(g)+ Cl₂(g)

(b) Calculate ΔG for the reaction if the partial pressures of the initial mixture are ${\text{P}}_{\text{PCl}}{}_{{}_5}$ = 0.0029 atm, ${\text{P}}_{\text{PCl}}{}_{{}_3}$ = 0.27 atm, and ${\text{P}}_{\text{Cl}}{}_{{}_2}$ = 0.40 atm.