At 500 K, Equilibrium constant, Kc, for the following reaction is 5.
1/2 H2(g) + 1/2 I2 (g) ⇋ HI (g)
What would be the Equilibrium constant Kc for the reaction
2HI (g) ⇋ H2(g) + I2 (g)
• For the reaction :
1/2 H2(g) + 1/2 I2 (g) ⇋ HI (g) Kc = [HI] = 5 (given)
For the reaction
H2(g) + I2 (g) ⇋2HI (g) , ) Kc = [HI]2 = (5)2 = 25
Hence, for the reaction 2HI (g) ⇋ H2(g) + I2 (g) , the value of Kc will be = = 1/25 = 0.04.