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Breaking and making bonds

Breaking and making bonds

Energy accounting diagram showing that breaking bonds takes energy in, making bonds releases energy, and the sign of the overall energy change identifies exothermic and endothermic reactions

During a chemical reaction, atoms are rearranged. Existing covalent bonds in the reactants break, and new covalent bonds form in the products.

5.1.3 The energy change of reactions (HT only) Lesson

  1. GCSE
  2. /Chemistry
  3. /5.1.3 The energy change of reactions (HT only)

Step-by-step lessons covering AQA GCSE Chemistry 5.1.3 The energy change of reactions (HT only) for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons