A chemical plant uses reaction A to make a product. The reaction can follow two different catalysed pathways.
| Catalyst | Activation energy for reaction A (kJ/mol\mathrm{kJ/mol}kJ/mol) |
|---|---|
| J | 71 |
| K | 43 |
Both pathways are tested at the same temperature.
Explain which catalyst the plant should use to obtain the greatest rate for reaction A.
The plant also carries out reaction B. Suggest whether catalyst K should be chosen for reaction B. Justify your answer.
122 exam-style questions on OCR GCSE Chemistry 5.2 Controlling reactions, covering 5.2.1 Measuring and interpreting rate of reaction, 5.2.2 Factors affecting rate and collision theory, and 5.2.3 Catalysts, activation energy and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.