Answer to Question #347448 in General Chemistry for Ashter

Question

Sulfur trioxide decomposes at high temperature in a sealed container according to the reaction 2SO₃(g) ⇆ 2SO₂(g) + O₂(g)

Initially, the vessel is charged at 1000 K with SO₃(g) at a partial pressure of 0.500 atm. At equilibrium the SO₃ partial pressure is 0.200 atm. Calculate the value of Kp at 1000 K.

Strategy:

Using the equilibrium table, tabulate the given initial and equilibrium partial pressures. Denote the changes in partial pressure using a variable as guided by stoichiometric coefficients in the balanced chemical equation. Solve for the unknown to calculate for the equilibrium partial pressures of SO₂ and O₂ and then solve for Kp.

Answer 1

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