Which will not appear in the equilibrium constant expression for the reaction below? H2O(g) + C(s) <--->H^2(g) + CO(g) A: [H2O] B: [C] C: [H2] D: [CO]

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asked Feb 25, 2019 187k views

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Fxlemire · Answer 1 · 2019-03-02T18:44:40+0000

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

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

Which will not appear in the equilibrium constant expression for the reaction below? H2O(g) + C(s) <--->H^2(g) + CO(g) A: [H2O] B: [C] C: [H2] D: [CO]

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