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CAIE IGCSE Chemistry Drawing and Labelling Reaction Pathways

Practise drawing complete exothermic or endothermic pathway diagrams with reactants, products, activation energy and correctly directed enthalpy arrows.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • place the product level below reactants for exothermic or above them for endothermic change
  • draw activation energy from the reactant level to the top of the pathway peak
  • draw the enthalpy arrow between reactant and product levels and label all species and axes

5.1.6—And label reaction pathway diagrams question 1

[Maximum number: 1]

The energy level diagram shows the energy profile for the reaction between zinc and dilute sulfuric acid.

Figure for Question 5.1.6—And label reaction pathway diagrams question 1 — CAIE IGCSE Chemistry

Draw an arrow on the diagram to represent the activation energy.

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