Chemistry 9701 · AS & A Level · Equilibria

Equilibria — practice question

Ammonia is made by using the Haber process. $\text{N}_2 + 3\text{H}_2 \rightleftharpoons 2\text{NH}_3 \qquad \Delta H^\circ = -92\,\text{kJ mol}^{-1}$ A problem with the temperature control in the process caused the temperature to rise to $600^\circ\text{C}$ for two hours. How did this affect ammonia production during this period?

  • AAmmonia was formed faster. The equilibrium yield decreased.
  • BAmmonia was formed faster. The equilibrium yield increased.
  • CAmmonia was formed slower. The equilibrium yield decreased.
  • DAmmonia was formed slower. The equilibrium yield increased.

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