Collision Theory Collisions needed to provide energy required for a particle to change (i.e. a bond to break) and to bring the reactants into contact.

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Presentation transcript:

Collision Theory Collisions needed to provide energy required for a particle to change (i.e. a bond to break) and to bring the reactants into contact

Reaction Rate Reaction needs sufficient kinetic energy Minimum energy is activation energy

In order to react, particles must… Collide with each other With sufficient energy In the correct geometrical alignment (steric factor)

Effect of concentration Increasing the concentration will….. The same effect is seen with pressure for gases

Effect of surface area Which will react faster, powder or lumps ? What must be kept the same if we are doing an investigation into this ?

Effect of Temperature Why does increasing the temperature increase the rate ?

Maxwell- Boltzmann Distribution

Maxwell Boltzmann Distribution Activation energy important

Effect of catalyst

Effect of light Excitation of reactants or breaking of bonds e.g. Silver halides

Orientation Geometry of reaction can be important