A reaction has an activation energy of 80 kJ/mol. It transfers 50 kJ/mol of energy to the surroundings.
Which row describes the reverse reaction?
| Activation energy of the reverse reaction (kJ/mol\mathrm{kJ/mol}kJ/mol) | Type of reverse reaction | |
|---|---|---|
| A | 30 | endothermic |
| B | 130 | endothermic |
| C | 130 | exothermic |
| D | 80 | exothermic |
Row A
Row B
Row C
Row D
51 exam-style questions on OCR GCSE Chemistry 3.2 Energetics, covering 3.2.1 Exothermic and endothermic reactions and reaction profiles and 3.2.2 Calculating energy change from bond energies. Each one has a worked solution and a mark scheme showing where the marks go.