In an industrial process, a reaction is carried out in a vessel surrounded by water. The water and the vessel make up the surroundings.
| Measurement | Value |
|---|---|
| Starting temperature of the water | 22.4 °C |
| Lowest temperature of the water | 17.9 °C |
| Relative energy of the reactants | 145 kJ/mol |
| Relative energy of the products | 163 kJ/mol |
Explain whether the reaction is exothermic or endothermic. Use calculations and all the data in the table.
85 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.