Question 120 of 164 in Rates of Reaction

How does a catalyst work?

1 mark · Easy

On a reaction profile diagram, what does the vertical distance between the reactants and the peak of the curve represent?

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Activation energy

Also accept: The activation energy; Energy barrier

Common mistakes: Enthalpy change; Energy of reactants

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Marking points

B1 · 1 mark · Correctly identifies activation energy.

Worked solution

It represents the activation energy.

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