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Factors Affecting Reaction Rates (Concentration (more reacting particles,…
Factors Affecting Reaction Rates
Temperature
increase of temperature
particles move faster
faster rate of reaction
measure of hot or cold
decrease of temperature
slows a reaction rate
Surface Area : increasing the surface area of a reactant will increase the reaction rate
smaller particle size, larger surface area
large surface area = exposure to reactants
more collisions
exposure of reactants to one another
more collisions, more particles react
Stirring
increases the exposure
particles react with other particles
Collisions are more likely to happen
Speeds up the reaction rate and speed
Concentration
number of particles in a given volume
more reacting particles
increases opportunities for reaction
more collisions
reaction rate is faster
gases
concentration changes with pressure
Catalysts
does not get used up in reaction
influences the reaction rate
attract reacting particles towards each other
neither a reactant nor a product
written over the arrow
speed up reactions
lets reaction happen at a lower temperature
Reaction Rates: the rate at which reactants change into products over time