The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant. N2O4 (g) ⇋ 2NO2 (g) Kc = 1.46 5N2O4 (g) ⇋ 10NO2 (g) Kc = ?

Kc is simply the ratio of the concentration of the product over the reactant, that is:

Kc = [NO2]^2 / [N2O4] = 1.46

Now since the overall equation or concentration is multiplied by 5, therefore:

{[NO2]^2 / [N2O4]}^5 = 1.46^5 = >

Kc = 6.63