A mixture is prepared during a test of a chemical process. The temperature readings are shown in the table.
| Time after mixing (minutes) | Temperature (∘C^\circ\text{C}∘C) |
|---|---|
| Before mixing | 22.0 |
| 1 | 17.0 |
| 3 | 14.0 |
| 6 | 16.0 |
Explain what the temperature readings show about the energy transfer and the relative energies of the products and reactants.
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.