Consider the following two equilibria and their respective equilibrium constants: (1) NO(g) + ½O₂(g) ⇄ NO₂(g)
(2) 2NO₂(g) ⇄ 2NO(g) + O₂(g)
Which one of the following is the correct relationship between the equilibrium constants K₁ and K₂?

Question

Quizplus · Accepted Answer

Equilibrium (2) is the reverse of equilibrium (1) but doubled. Therefore, the equilibrium constant for (2), $K_{2}$, is the reciprocal of the square of the equilibrium constant for (1), $K_{1}$, i.e., $K_{2} = (1/K_{1})^2$.

Consider the Following Two Equilibria and Their Respective Equilibrium Constants