Reaction rate – collision model (concentration, temperature, catalyst, surface area)

ChemistryKinetics & EquilibriumAges 15–16

Gas particle A collides with solid B (block or powder); only collisions with enough activation energy form product C. The graph of C particles over time keeps the previous run's curve so you can compare as you raise the concentration of A, raise the temperature (Arrhenius, van 't Hoff rule), add a catalyst, or crush B into powder; the average rate and the effective-collision probability update live.