Determine ∆G° for the reaction N₂O₄(g) ⇌ 2 NO₂(g) (K = 0.144 at 298 K).
(a) ∆G° = -RT ln(K)
(b) ∆G° = -2RT ln(K)
(c) ∆G° = -RT / ln(K)
(d) ∆G° = 2RT / ln(K)