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Chemistry · May / June 2017 · Paper 11 · Question 18

5070Reversible reactions and equilibrium

The equation shows the formation of sulfur trioxide in the contact process. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = –196 kJ / mol What would decrease the yield of sulfur trioxide?

  1. Aaddition of more oxygen
  2. Ban increase in pressure
  3. Can increase in temperature
  4. Dremoval of sulfur trioxide from the reaction chamber

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Correct answer: C. an increase in temperature

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