Question

Which will not appear in the equilibrium constant expression for the reaction below?

Answer 1

a

is the answer i just took the tes

Answer 2

Answer: B: [C]

Explanation: $H_2O(g)+C(s)\leftrightharpoons H_2(g)+CO(g)$

Equilibrium constant is defined as the ratio of the product of the concentration of products to the product of the concentration of reactants each raised to their stochiometric coefficient.

$K=\frac{[H_2][CO]}{[H_2O][C]$

But the concentration of solids in their standard state is taken as 1.

Thus [C(s)] =1

$K=\frac{[H_2][CO]}{[H_2O]$