For the reaction shown below at equilibrium, the equilibrium constant expression is?

Question

option 1

option 2

Option 3

Option 4

Answer 1

The equilibrium expression is the product of the concentrations of the products raised to a power of their coefficient divided by the product of the concentrations of the reactant raised to a power of their coefficient. Concentration of solids are taken as unity and are NOT included in the equilibrium expression.

Thus, for 4HCl(s) + O₂(g) <==> 2H₂O(g) + 2Cl₂(g), the equilibrium expression would be ...

K = [H₂O]²[Cl₂]² / [O₂] ... (Answer #4)