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Chemistry · Oct / Nov 2017 · Paper 12 · Question 20

5070Reversible reactions and equilibrium

Sulfur trioxide is produced by the following reaction. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = –195 kJ Which change in conditions would produce a greater amount of SO3 at equilibrium?

  1. Aadding a catalyst
  2. Bincreasing the pressure
  3. Cincreasing the temperature
  4. Dremoving some SO2 and O2

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Correct answer: B. increasing the pressure

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