Question

Calculate the value of K_c for the reaction: 2 NO(g) + Br₂(g) ----> 2NOBr (g) using the following information.

Answer 1

2 NO(g) ---->  N₂(g) + O₂(g)     K_c1 = 1 x 10³⁰ 

N₂(g) + Br₂(g) + O₂(g) ----> 2 NOBr(g)    K_c2 = 2 x 10^-27 

The two equations can be added to yield the desired equation. The value of K_c for the reaction will be the product of the other two. 

K'c = K_c1 x K_c2 = (1 x 10³⁰)(1 x 10^-27) = 2 x 10³