How does a catalyst work?
2 marks · EasyThe energy of the reactants is 180 kJ/mol and the energy at the peak of the reaction profile (with a catalyst) is 130 kJ/mol. Calculate the activation energy for this pathway.
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50 kJ/mol (±0.5)
Common mistakes: Adding the numbers instead of subtracting.
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Marking points
M1 · 1 mark · Subtracts reactant energy from peak: 130 - 180.
A1 · 1 mark · Correct final answer: 50 kJ/mol. (follow-through)
Worked solution