A reaction profile is drawn for a reaction.
The energy of the reactants is 0 kJ/mol. The top of the peak is at +185 kJ/mol. The energy of the products is -92 kJ/mol.
Which row shows the activation energy and the energy change for the reaction?
| Activation energy (kJ/mol\mathrm{kJ/mol}kJ/mol) | Energy change (kJ/mol\mathrm{kJ/mol}kJ/mol) | |
|---|---|---|
| A | 277 | -92 |
| B | 185 | -92 |
| C | 185 | +92 |
| D | 93 | -92 |
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.