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Factors Affecting Reaction Rates (Surface Area (Increasing the surface…
Factors Affecting Reaction Rates
TEMP
Average KE causes more collisions.
greater % of particles have enough speed/energy.
Surface Area
Increasing the surface area of a solid reactant increase the number of collisions
Surface area is for solids only
Concentration
Increasing the concentration of reactants generally increases the rate of reaction
more of the reacting molecules or ions are present to form the reaction products
Pressure
Increasing the pressure on a reaction involving reacting gases increases the rate of reaction.
Changing the pressure on a reaction that involves only solids or liquids has no effect on the rate.
NATURE OF REACTANTS
or Bonds, determines whether rxn is fast or slow depending on state of matter (solids are slower than that of liquids and gases).
Reactions involving ionic compounds are faster than covalent bonds.
CATALYSTS
Without being used up or changed permanently, cause more collisions by lowering and changing activation energy by providing another pathway with lower energy.
Dana AlKadhi
Nahla AlJeraisy
