Question

In which of the following equilibria, the value of $K_{p}$ is less than $K_{c}$?

• A. $H_{2} + I_{2} \rightleftharpoons 2HI$
• B. $N_{2} + 3H_{2} \rightleftharpoons 2NH_{3}$
• C. $N_{2} + O_{2} \rightleftharpoons 2NO$
• D. $CO + H_{2}O \rightleftharpoons CO_{2} + H_{2}$

Answer 1

Answer: (B)

$K_{p} = K_{c} (RT)^{\Delta n};$ When $\Delta n = 2 - (2 + 1) = - 1,$ i.e., negative, $K_{p} < K_{c}$.