1. Reaction Rate
A measure of the speed of any change that occurs within an interval of time
Usually expressed as the amount of reactant changing per unit of time
Ways to measure:
Amount of precipitate produced/time
Amount of gas produced/time (change in pressure)
Change in color/time using a spectrophotometer

2. Collision Theory
Reaction rates depend on the collisions of reacting particles
The more collisions, the faster the reaction rate
Molecules must collide with enough energy AND proper orientation

3. Factors Affecting Reaction Rates
Nature of Reactants
Surface Area
Temperature
Catalysts
Concentration

4. Activation Energy
Minimum amount of energy necessary for a reaction to occur
It’s much like a roller coaster!

5. Activated Complex A high energy arrangement of reactant molecules
It is a transition state that is neither product nor reactant
Exists where energy is the greatest

6. Potential Energy Diagrams
activated complex
Hproducts
Hreactants
activation energy ∆H

7. Catalyzed Reaction