Factors Affecting Reaction Rate

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Presentation transcript:

Factors Affecting Reaction Rate

A + B  Black Iodine Clock Rxn Demo Trial 1 0.10M 2 0.20M 3 0.05M 4 5 6 hot Fill in from H textbook pg 544 table 17-3 cold catalyst

Maxwell-Boltzmann Distribution

Factors Affecting Reaction Rate Concentration Surface area (particle size) Temperature Presence of a catalyst/inhibitor

Concentration

Surface Area Decreasing the particle size increases the amount of surface area where the reaction can take place, increasing the rate at which the reaction can occur Here the reaction between the solid magnesium metal and hydrogen ions can only happen at the surface

Temperature # of collisions Kinetic Energy

Catalyst/Inhibitor ′ ratecatalyzed > rateuncatalyzed Ea < Ea k Ea < Ea ′

Haber Process Fe/Al2O3/K2O catalyst N2 (g) + 3H2 (g) 2NH3 (g)