PHYSICAClass 12 Chemistry simulations · Chemical Kinetics
How a catalyst speeds up a reaction
Add a catalyst that lowers the activation energy and compare the rates at the same temperature.
What to notice
A catalyst provides a path with lower Eₐ; it does not change ΔH or the position of equilibrium.
Key relation
k_cat / k = e^(ΔEₐ / RT)
Try this
Lower Eₐ by 20 kJ/mol at 298 K. How many times faster is the reaction?
What you can change
- Uncatalysed Eₐ: 40 to 150 kJ/mol
- Lowering by catalyst: 0 to 60 kJ/mol
- Temperature: 250 to 500 K
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