Ammonia is produced by the Haber process. $\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g) \quad \Delta H = -92\,\text{kJ mol}^{-1}$ For this reaction, which rows show a statement that is true and a reason that is correct?
- A1 and 2 only
- B2 and 3 only
- C3 and 4 only
- D1, 2 and 3 only