engineering chemistry MCQ #2173

For the reaction 2SO2 + O2 ⇌ 2SO3, if the initial concentrations are [SO2] = 2M, [O2] = 1M, and [SO3] = 0, what is the equilibrium expression?

engineering chemistry MCQ #2173

  1. Question 1

    Q1. For the reaction 2SO2 + O2 ⇌ 2SO3, if the initial concentrations are [SO2] = 2M, [O2] = 1M, and [SO3] = 0, what is the equilibrium expression?

    • A) [SO3]² / ([SO2]²[O2])
    • B) [SO3] / ([SO2][O2])
    • C) [SO2]²[O2] / [SO3]²
    • D) [SO2][O2] / [SO3]

    Answer: [SO3]² / ([SO2]²[O2])

    Explanation: Kc = [products] / [reactants] raised to their stoichiometric coefficients, so Kc = [SO3]² / ([SO2]²[O2]).