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JAMB Chemistry 1995 Question 32

Question 32

Rates of Reaction

Use the diagram above. The activation energy of the uncatalysed reaction is

Diagram for this question
  1. A.x
  2. B.x + y
  3. C.x − y
  4. D.y
Show the answer and explanation

Answer: A (x)

Explanation

Activation energy is the height of the energy barrier above the reactants. For the uncatalysed path (I, the higher curve) this is the distance x from the N2 + 3H2 level to the top. y is the enthalpy change.