Question

6. The equilibrium constant Kc for the reaction: 2SO2 (g) + O2 (g) → 2SO3 (g) is 800 at 527oC. Calculate the equilibrium constant for the reaction SO3 (g) → SO2 (g) + ½O2. (4 marks)

Answer 1

Answer:

Explanation:

Data analysis:

Kc=800

Consider the reaction

2So2+O2 to give 2So3

Required: So3 to give So2+1/2O2

Reverse the given equation

2So3 to give 2So2+O2

Then multiply the given reversed equation by 1/2

1/2×2So3 to give 1/2×2So2+1/2O2

This will be,

So3 to give So2+1/2O2

Hence kc2=1/kc2×1/2

Kc2=1/800×1/2

Kc2=6.25×10^-4.Ans