Edexcel IAL Chemistry AS 9.8 Catalysts and Maxwell–Boltzmann distributions
Edexcel IAL Chemistry AS 9.8 Catalysts and Maxwell–Boltzmann distributions

Pearson Edexcel IAL Chemistry syllabusChemistry YCH11First assessment 2019
Keep the distribution curve fixed at constant temperature, place catalysed Eₐ to the left and compare the larger area whose particles can react.
How this is tested
- Label distribution axes and place catalysed Eₐ left of the uncatalysed threshold.
- Interpret the larger area beyond catalysed Eₐ as more particles able to react.
- Explain the faster rate through more successful collisions per unit time, not a shifted curve.