(a) In an experiment, 2.0 mmol Cl₂(g) was sealed into a reaction vessel of volume 2.0 L and heated to 1000. K to study its dissociation into Cl atoms. Use the information in Table 5G.2 to calculate the equilibrium composition of the mixture.

(b) If 2.0 mmol F₂ was placed into the reaction vessel instead of the chlorine, what would be its equilibrium composition at 1000. K?

(c) Use your results from parts (a) and (b) to determine which is thermodynamically more stable relative to its atoms at 1000. K, Cl₂ or F₂.