Chemistry · May / June 2016 · Paper 12 · Question 14

Ammonia can be produced industrially from nitrogen and hydrogen. N2(g) + 3H2(g) ⇌ 2NH3(g) The forward reaction is exothermic. Which change would not alter the yield of ammonia?

1. Aadding a catalyst
2. Bdecreasing the pressure
3. Cdecreasing the temperature
4. Dremoving some ammonia during the reaction

As printed in the paper