Consider the reaction.
An equilibrium mixture of this reaction at a certain temperature has [H2S] = 0.562 M, [H2] = 2.74 × 10−2 M, and [S2] = 7.54 × 10−3 M. What is the value of the equilibrium constant at this temperature?
Solution:=]] mere, we are going to find the value of the equilibrium constant for the given reaction at the given temperature.
The equilibrium constant for a general reaction,
aA + bB ⇄ cC + dD
is expressed as,
Kc = [C]c [D]d / [A]a [B]b
Where [A], [B], [C] and [D] are the equilibrium concentrations of the reactants and products.
For the reaction, 2H2S(g) ⇄ 2H2(g) + S2(g)
Kc = [S2] [H2]2 / [H2S]2