Chemistry 0620 · IGCSE · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

The equation representing the formation of ammonia is given below. $\text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3$ A diagram of the reaction’s energy levels is shown. What is the energy change for the reaction?

  • A$-592\,\text{kJ mol}^{-1}$
  • B$-92\,\text{kJ mol}^{-1}$
  • C$+92\,\text{kJ mol}^{-1}$
  • D$+592\,\text{kJ mol}^{-1}$

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