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Chemistry · May / June 2019 · Paper 11 · Question 16

5070Exothermic and endothermic reactions

The diagram shows the energy profile for a reaction. Which statement about this reaction is correct?

  1. AIt is endothermic and the activation energy is P – Q.
  2. BIt is endothermic and the activation energy is P – R.
  3. CIt is exothermic and the activation energy is P – Q.
  4. DIt is exothermic and the activation energy is P – R.

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Correct answer: B. It is endothermic and the activation energy is P – R.

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