Ammonia is produced in an exothermic reaction. $\text{N}_2(\text{g}) + 3\text{H}_2(\text{g}) \rightleftharpoons 2\text{NH}_3(\text{g})$. What effect does reducing the pressure have on the rate at which ammonia forms and on the percentage yield of ammonia at equilibrium?
- Arate of formation decreases; percentage yield decreases
- Brate of formation decreases; percentage yield increases
- Crate of formation increases; percentage yield decreases
- Drate of formation increases; percentage yield increases