For the reaction: 2NOCl(g) ⇌ 2NO(g) + Cl₂(g), ΔH° = 18 kcal and ΔS° = 30 cal/K at 300 K. The equilib — Chemical Equilibrium Chemistry Question

💡 Solution & Explanation

First, find ΔG° = ΔH° - TΔS° = 18000 cal - 300 K(30 cal/K) = 18000 - 9000 = 9000 cal/mol. Using ΔG° = -RT ln K_p, 9000 = -2(300) ln K_p => 9000 = -600 ln K_p. Thus, ln K_p = -15, leading to K_p = e⁻¹⁵. Therefore, correct answer is B.