A reaction vessel is surrounded by water. The following reaction takes place inside the vessel:
2C≡O+O=O→2O=C=O2\text{C}\equiv\text{O} + \text{O}=\text{O} \rightarrow 2\text{O}=\text{C}=\text{O}2C≡O+O=O→2O=C=O
The table gives the bond energies.
| Bond | Bond energy in kJ/mol |
|---|---|
| C≡O\text{C}\equiv\text{O}C≡O | 1077 |
| O=O\text{O}=\text{O}O=O | 498 |
| C=O\text{C}=\text{O}C=O | 805 |
Calculate the overall energy change for the reaction.
Explain how the reaction affects the temperature of the water surrounding the vessel.
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.