What is the value of Kc?

Question

The reaction below has a K_p value of 41.0. What is the value of K_c for this reaction at 225. K?

N₂(g) + 3 H₂(g) ⇌ 2 NH₃(g)

Answer 1

Kp = Kc (RT)^∆n

Kp = 41.0

R = 0.0821 Latm/Kmol

T = 225K

∆n = change in moles of gas = 2 - 4 = -2

Solving for Kc, we have...

41.0 = Kc(0.0821 x 225)^-2

41.0 = 0.233 Kc

Kc = 176