Ammonia may be manufactured on an industrial scale from nitrogen and hydrogen. $\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g)$. The forward reaction is exothermic. Which change would leave the ammonia yield unchanged?
- Aadding a catalyst
- Bdecreasing the pressure
- Cdecreasing the temperature
- Dremoving some ammonia during the reaction