Predicting the Direction of Approach to EquilibriumAt 448

Chapter 10, Problem 10PE

(choose chapter or problem)

Problem 10PE

Predicting the Direction of Approach to Equilibrium

At 448 °C, the equilibrium constant Kc for the reaction

H2(g) + I2(g) ⇌ 2 HI(g)

is 50.5. Predict in which direction the reaction proceeds to reach equilibrium if we start with 2.0 × 10-2 mol of HI, 1.0 × 10-2 mol of H2, and 3.0 × 10-2 mol of I2 in a 2.00-L container.

At 1000 K, the value of Kp for the reaction 2 SO3(g) ⇌ 2 SO2(g) + O2(g) is 0.338. Calculate the value for Qp, and predict the direction in which the reaction proceeds toward equilibrium if the initial partial pressures are PSO3 = 0.16 atm; PSO2 = 0.41 atm; PO2 = 2.5 atm.