3. The following equilibrium constants were determined at 1123K:

C(s) + CO2(g) ↔ 2CO(g) Kp’ = 1.3 x 1014
CO(g) + Cl2(g) ↔ COCl2(g) Kp” = 6.0 x 10-3

Write the equilibrium constant expression Kp, and calculate the equilibrium constant at 1123K for
C(s) + CO2(g) + 2Cl2(g) ↔ 2COCl2(g)