Chemistry 5070 · O Level · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

When the conditions are suitable, nitrogen reacts with oxygen to produce $\text{N}_2\text{O}$. $2\text{N}_2(\text{g}) + \text{O}_2(\text{g}) \rightleftharpoons 2\text{N}_2\text{O}(\text{g})$ A reaction pathway diagram is given. What is the activation energy for the reverse reaction?

  • A$-447\,\text{kJ mol}^{-1}$
  • B$-283\,\text{kJ mol}^{-1}$
  • C$+141.5\,\text{kJ mol}^{-1}$
  • D$+283\,\text{kJ mol}^{-1}$

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