A reaction profile shows the products at a higher energy than the reactants. Which statement about the bonds in this reaction is correct?
More energy is released forming bonds than is needed to break bonds
The energy needed to break the bonds is the activation energy of the reaction
More energy is needed to break bonds than is released forming bonds
The energy released forming the bonds is equal to the activation energy
39 exam-style questions on AQA GCSE Chemistry 5.1 Exothermic and endothermic reactions, covering 5.1.1 Energy transfer during exothermic and endothermic reactions, 5.1.2 Reaction profiles, and 5.1.3 The energy change of reactions. Each one has a worked solution and a mark scheme showing where the marks go.