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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.

Published byRandolf Sanders Modified over 8 years ago

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Presentation on theme: "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."— Presentation transcript:

1 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

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

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

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

5 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 ?

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

7 Maxwell- Boltzmann Distribution

8 Maxwell Boltzmann Distribution Activation energy important

9 Effect of catalyst

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

11 Orientation Geometry of reaction can be important

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