For an endothermic reaction, which energy comparison is correct?
Bond making absorbs more energy than bond breaking releases
Bond breaking absorbs more energy than bond making releases
Both processes release equal energy
The products have lower energy than the reactants
94 exam-style questions on Edexcel GCSE Chemistry 8.2 Heat energy changes in chemical reactions, covering 8.2.1 Exothermic and endothermic changes, 8.2.2 Bond breaking, bond making and overall energy change, 8.2.3 Calculating energy change from bond energies, and 8.2.4 Activation energy and reaction profiles. Each one has a worked solution and a mark scheme showing where the marks go.