Question

What is the equilibrium constant expression for the given system?

Answer 1

Answer:

$\displaystyle K_{eq} = \frac{[H_2]^2[O_2]}{[H_2O]^2}$

General Formulas and Concepts:

Chemistry

Aqueous Solutions

• States of matter

Kinetics

• Rate Laws

Equilibrium

• Equilibrium Reactions RxN ⇄
• Equilibrium Constants
• Equilibrium Expression: $\displaystyle K = \frac{[Producst]^{coefficients}}{[Reactants]^{coefficients}}$

Explanation:

*Note: Only gases and liquids affect equilibrium

Step 1: Define

[RxN - Balanced] 2H₂O (g) ⇄ 2H₂ (g) + O₂ (g)

Step 2: Identify

[Reactant] H₂O

• Coefficient of 2

[Product] H₂

• Coefficient of 2

[Product] O₂

• Coefficient of 1

Step 3: Write K Expression

1. Substitute:                                                                                                       $\displaystyle K_{eq} = \frac{[H_2]^2[O_2]}{[H_2O]^2}$