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Rate of reaction
Describes how rapidly the reactants are consumed or the product is formed.
Collision Theory
Explains why different reactions occur at different rates and suggests ways to change the rate of a reaction.
Activation energy
The minimum amount of energy that particles must collide with to react.
Kinetic energy of the particles
The energy associated with the motion of particles.
Catalyst
Substances that speed up the rate of a reaction without being consumed in the reaction.
Surface area to volume ratio
The ratio that affects the rate of reaction in solids.
Pressure of reacting gases
A factor that influences the rate of reaction in gaseous systems.
Enzymes
Biological catalysts made from proteins that speed up reactions in living organisms.
Rate Graphs
Graphical representations used to measure the rate of reactions over time.
Factors affecting the rate of reaction
Nature of reactants
Temperature
Concentration of reactants
Surface area
Presence of a catalyst
factors affecting the collision of particles
-Number of particles per unit volume
-Frequency of collisions
-Activation energy
-Kinetic energy of the particles
Note 
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