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what is the collision theory
chemical reactions can occur only when reacting particles collide with each other and with sufficient energy
what is the activation energy
the minimum amount of energy that particles must have to react
how can you increase the frequency of collisions
Increasing the:
-concentration of reactants in solution,
-the pressure of reacting gases,
-and the surface area of solid reactants
increases the frequency of collisions and so increases the rate of reaction.
how does temperature increase the rate of reaction (hint: energetic)
Increasing the temperature increases the frequency of collisions and makes the collisions more energetic, and so increases the rate of reaction.
what are catalysts
Catalysts are substances that speed up chemical reactions without being changed or used up during the reaction.
what are enzymes
Enzymes act as catalysts in biological systems
how do catalysts increase the rate of reaction
● Catalysts decrease the activation energy; this increases the proportion of particles with energy to react.
● Catalysts provide a different pathway for a chemical reaction that has a lower activation energy.
Note 
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