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Chemistry · Oct / Nov 2020 · Paper 12 · Question 20

5070Exothermic and endothermic reactions

The energy profile diagram of a chemical reaction is shown. [energy profile diagram: y-axis energy kJ/mol 0–250, x-axis progress of reaction; reactants at 150, products at 50, peak at 250] What is the value of the activation energy of the reaction?

  1. A–200 kJ / mol
  2. B–100 kJ / mol
  3. C+100 kJ / mol
  4. D+200 kJ / mol

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Correct answer: C. +100 kJ / mol

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