CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
Two different dissociation reactions, each of the form X₂(g) ⇌ 2 X(g), come to equilibrium at 500 K in four separate 1.0 L containers. The particulate data are:
• Container 1 (P₂ ⇌ 2 P): 40 P₂ and 0 P
• Container 2 (P₂ ⇌ 2 P): 20 P₂ and 20 P
• Container 3 (Q₂ ⇌ 2 Q): 10 Q₂ and 30 Q
• Container 4 (Q₂ ⇌ 2 Q): 15 Q₂ and 15 Q
Which ranking orders the four containers from LARGEST to SMALLEST equilibrium constant K?
(If two K values are equal, list them in any order within the ranking.)
(a) 1 > 4 > 2 > 3
(b) 3 > 2 > 4 > 1
(c) 2 > 3 > 4 > 1
(d) 3 > 4 > 2 > 1