For which of the following equilibrium systems is the ratio K_p K_c equal to 1 RT ? (Assume ideal gas behaviour)

Step-by-step solution

The relationship between K_p and K_c is given by K_p = K_c(RT)^ n_g K_p K_c = (RT)^ n_g Given K_p K_c = 1 RT = (RT)⁻¹ This implies n_g = -1 Evaluating n_g for the given reactions: For PCl ₅ (g) PCl ₃ (g) + Cl ₂ (g) , n_g = 2 - 1 = 1 For 2 SO ₂ (g) + O ₂ (g) 2 SO ₃ (g) , n_g = 2 - 3 = -1 For H ₂ (g) + Br ₂ (g) 2 HBr(g) , n_g = 2 - 2 = 0 For C(s) + H ₂ O(g) CO(g) + H ₂ (g) , n_g = 2 - 1 = 1 The reaction 2 SO ₂ (g) + O ₂ (g) 2 SO ₃ (g) has n_g = -1 . Answer: 2 SO ₂ (g) + O ₂ (g) 2 SO ₃ (g)