Chemistry 102: Equilibrium: Find value of Kp

Question

Phosgene (COCl₂) is used in the manufacture of foam rubber and bulletproof glass. It is formed from carbon monoxide and chlorine in the following reaction:

Cl2​(g)+CO(g)COCl2​(g)

The value of K_c for the reaction is 10.9 at 430.2 °C. What is the value of K_p at 430.2 °C?

Answer 1

Cl₂​(g) + CO(g)COCl₂​(g)

Kp = Kc(RT)^∆n

Kp = ?

Kc = 10.9

R = 0.0821 Latm/Kmol

T = 430.2C + 273.15 = 703.35K

∆n = change in moles of gas = 1 - 2 = -1

Solving for Kp, we have..

Kp = 10.9(0.0821*703.35)^-1

Kp = 10.9 x 0.0173

Kp = 0.189