Determine the value of equilibrium constant (Kc) for the reaction A₂(g) + B₂(g) ⇌ 2AB(g) If 10 moles of A₂, 15 moles of B₂ and 5 moles of AB are placed in a 2 litre vessel and allowed to come to equil

Question

Determine the value of equilibrium constant (Kc) for the reaction A₂(g) + B₂(g) ⇌ 2AB(g) If 10 moles of A₂, 15 moles of B₂ and 5 moles of AB are placed in a 2 litre vessel and allowed to come to equilibrium. The final concentration of AB is 7.5 M :

Accepted Answer

Answer: 4.5 — Initial concentration of AB = 5/2 = 2.5 M. Final concentration = 7.5 M. Increase = 5 M, hence A₂ and B₂ each decrease by 2.5 M. Equilibrium concentrations become A₂ = 2.5 M, B₂ = 5 M and AB = 7.5 M. T

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