Catalysts in industry
2 marks · NormalDraw a reaction profile diagram for a reaction with and without a catalyst. Clearly label the energy of reactants, energy of products, activation energy with and without catalyst, and the enthalpy change (ΔH).
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Must show: profile curve for catalysed and uncatalysed path, labels: reactants, products, Ea (with and without catalyst), ΔH
Also accept: Alternative clear diagram with all requested labels
Common mistakes: Not showing both activation energies; Failing to show ΔH
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Marking points
B1 · 1 mark · Diagram shows both catalysed and uncatalysed activation energy paths with reactants and products labelled
B2 · 1 mark · Correctly labels activation energies (Ea with/without catalyst) and ΔH
Worked solution