Which of the following options correctly describes what occurs during an endothermic reaction?
Thermal energy is absorbed from the surroundings.
Thermal energy is released to the surroundings.
A gas is produced.
Light is emitted.
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.