For the reaction 2C(g) ⇌ D(g) at temperature T, the equilibrium constant K_c is 4.0. The compositions of four identical containers (I–IV) at T are listed below.
Container I : 2 C and 8 D
Container II : 3 C and 36 D
Container III : 4 C and 20 D
Container IV : 5 C and 80 D
Which container is most consistent with a mixture at equilibrium?
a) Container I
b) Container IV
c) Container II
d) Container III