The Haber process operates with a nitrogen partial pressure of $50\,\text{kPa}$, a hydrogen partial pressure of $150\,\text{kPa}$, a temperature of $400^\circ\text{C}$ and an iron catalyst. $\text{N}_2\text{(g)} + 3\text{H}_2\text{(g)} \rightleftharpoons 2\text{NH}_3\text{(g)}$ If all the other conditions remain unchanged, which alteration will produce a higher activation energy?
- ABoth the nitrogen and hydrogen partial pressures are changed to $100\,\text{kPa}$.
- BThe iron is removed.
- CThe nitrogen partial pressure is increased to $150\,\text{kPa}$.
- DThe temperature is increased to $500^\circ\text{C}$.