Rate of Reaction & Collision Theory

Molecules always collide correctly

All collisions result in products

Explosion

No reaction

Molecules move FASTER and collide LESS often at higher temperatures

Molecules move FASTER and collide MORE often at higher temperatures

Molecules move SLOWER and collide MORE often at higher temperatures

Molecules move SLOWER and collide LESS often at higher temperatures

charge and mass

charge and orientation

energy and mass

energy and orientation

Joule (J)

STP

catalyst

activation energy

endothermic

exothermic

catalyst

activation energy

endothermic

exothermic

catalyst

activation energy

The concentration of products decreases, and the concentration of reactants increases

The concentration of reactants decreases, and the concentration of products increases

More exposed sites for reactants to collide

Fewer exposed sites for reactants to collide

Addition of a catalyst

Increasing the temperature

Increasing the concentration of the limiting reactant

Decreasing the surface area

Catalysts are not related to reaction rates

Keeps reactants apart from one another to bring the reaction rate to zero

Decreases the rate of reaction by bringing the reactants together in the correct orientation.

Increases the rate of reaction by bringing the reactants together in the correct orientation.

Increasing temperature increases the rate of reaction

Increasing temperature decreases the rate of reaction

Temperature does not impact rate of reaction

Decreasing temperature increases the rate of reaction