Ammonia is made by means of the Haber process. $\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g)$ The forward reaction gives out heat. Which one of the following statements about the Haber process is correct?
- AA low pressure is used to shift the position of the equilibrium to the right.
- BA high temperature is used to shift the position of the equilibrium to the right.
- CAn iron catalyst is used to shift the position of the equilibrium to the right.
- DThe nitrogen used is obtained from the air.