The elementary reaction

Question

2H2O(g)↽−−⇀2H2(g)+O2(g)

proceeds at a certain temperature until the partial pressures of H2O,H2, and O2 reach 0.0100 atm, 0.00250 atm, and 0.00750 atm, respectively. What is the value of the equilibrium constant at this temperature?

Kp=______

Answer 1

2H₂O(g)↽−−⇀2H₂ (g) +O₂(g)

0.0100..........0.0025....0.0075 atm

Kp = (H₂)²(O₂) / (H₂O)²

Kp = (0.0025)²(0.0075) / (0.01)²

Kp = 4.69x10^-4