Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

A reaction pathway diagram for a chemical reaction is shown. Which statement is correct?

  • AThe activation energy of the forward reaction and the enthalpy change of the backward reaction have the same sign.
  • BThe activation energy of the forward reaction is more than twice the enthalpy change of the backward reaction and opposite in sign.
  • CThe enthalpy change of the forward reaction and the activation energy of the backward reaction have the same sign.
  • DThe enthalpy change of the forward reaction is more than twice the activation energy of the backward reaction.

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