Chemistry 5070 · O Level · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

The diagram illustrates the energy profile for a reaction. Which statement concerning this reaction is correct?

  • AIt is endothermic and the activation energy is $P - Q$.
  • BIt is endothermic and the activation energy is $P - R$.
  • CIt is exothermic and the activation energy is $P - Q$.
  • DIt is exothermic and the activation energy is $P - R$.

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