Chapter 12, Problem 60E

Lexan is a plastic used to make compact discs, eyeglass lenses, and bulletproof glass. One of the compounds used to make Lexan is phosgene (COCI₂), an extremely poisonous gas. Phosgene decomposes by the reaction

${\text{COCl}}_2\left(g\right)\rightleftharpoons \text{CO}\left(g\right)+{\text{Cl}}_2\left(g\right)$

for which K_P = 6.8 × 10⁻⁹ at 100°C. If pure phosgene at an initial pressure of 1.0 atm decomposes, calculate the equilibrium pressures of all species.