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JAMB Chemistry 1988 Question 26

Question 26

Energy Changes

The diagram shows the reaction path of an exothermic reaction. The heat of reaction is represented by

Diagram for this question
  1. A.I
  2. B.II
  3. C.III
  4. D.IV.
Show the answer and explanation

Answer: D (IV.)

Explanation

The heat of reaction is the energy difference between the reactants and the products. On the diagram that gap is labelled IV; the other labels measure from the peak (activation energy) or to the axis.