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Chemistry notebook Cambridge IGCSE 0620

Topic 5 of 12 · 2 modules planned

Chemical energetics

Why some reactions warm their surroundings and others cool them.

Modules

  1. Module 1 · syllabus 5.1

    Energy changes in reactions

    Where does the heat come from?

    This module is planned. It will have readings, an experiment, practice with self-checks and a final check.

Syllabus statements for this topic · for teachers · 8 statements

Core for every pupil · Supplement also for Extended entry. Paraphrased from the Cambridge IGCSE Chemistry 0620 syllabus (2026–2028); check the official syllabus for exact wording.

5.1 Exothermic and endothermic reactions

  • 5.1.1Exothermic change and surroundingsC
  • 5.1.2Endothermic change and surroundingsC
  • 5.1.3Reading reaction energy profilesC
  • 5.1.4Enthalpy change and its signS
  • 5.1.5Activation-energy thresholdS
  • 5.1.6Drawing labelled reaction profilesS
  • 5.1.7Bond breaking/making and energy balanceS
  • 5.1.8Bond-energy calculationsS