A chemical reaction takes place in a sealed vessel. A jacket around the vessel contains water. The water does not mix with the reacting chemicals, and no external heating is used.
| Measurement | Temperature of water |
|---|---|
| Before the reaction | 18.0 ∘C18.0\ ^\circ\text{C}18.0 ∘C |
| Highest temperature during the reaction | 26.5 ∘C26.5\ ^\circ\text{C}26.5 ∘C |
Use the data to explain the energy transfers during the reaction. Predict how the energy of the products compares with the energy of the 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.