Question

write the pressure equilibrium constant expression for this reaction.
h₂o(g)+c(s)→h₂(g)+co(g)

Explanation:

Step1: Recall the formula for pressure equilibrium constant

For a general reaction \(aA(g)+bB(s)
ightleftharpoons cC(g)+dD(g)\), the pressure equilibrium constant \(K_p=\frac{P_C^c\times P_D^d}{P_A^a}\) (solids and liquids are omitted as their activities are considered 1).

Step2: Apply the formula to the given reaction

In the reaction \(H_2O(g)+C(s)
ightleftharpoons H_2(g)+CO(g)\), \(a = 1\) (for \(H_2O\)), \(c = 1\) (for \(H_2\)), \(d=1\) (for \(CO\)), and \(C(s)\) is a solid.
So \(K_p=\frac{P_{H_2}\times P_{CO}}{P_{H_2O}}\)

Answer:

\(K_p=\frac{P_{H_2}\times P_{CO}}{P_{H_2O}}\)