# Problem: Write the pressure equilibrium constant expression for this reactionH2O (g) + C (s) → H2 (g) + CO (g)

###### FREE Expert Solution

We’re being asked to determine the equilibrium expression of this reaction:

H2O (g) + C (s) → H(g) + CO (g)

Recall that the equilibrium constant is the ratio of the products and reactants. We use Kp when dealing with pressure and Kc when dealing with concentration:

$\overline{){{\mathbf{K}}}_{{\mathbf{p}}}{\mathbf{=}}\frac{{\mathbf{P}}_{\mathbf{products}}}{{\mathbf{P}}_{\mathbf{reactants}}}}$     $\overline{){{\mathbf{K}}}_{{\mathbf{c}}}{\mathbf{=}}\frac{\mathbf{\left[}\mathbf{products}\mathbf{\right]}}{\mathbf{\left[}\mathbf{reactants}\mathbf{\right]}}}$

Note that solid and liquid compounds are ignored in the equilibrium expression.

89% (81 ratings)
###### Problem Details

Write the pressure equilibrium constant expression for this reaction

H2O (g) + C (s) → H2 (g) + CO (g)