What is an endothermic reaction?
A reaction that releases heat energy to the surroundings
A reaction that takes in heat energy from the surroundings
A reaction that forms no bonds
A reaction in which the temperature of the mixture rises
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.