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Chemical Kinetics – collision theory

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Presentation on theme: "Chemical Kinetics – collision theory"— Presentation transcript:

1 Chemical Kinetics – collision theory

2 Main Idea Collision theory relates the rates of chemical reaction to collisions between reacting particles. It is the key to understanding why some reactions are faster than others.

3 The reaction rate of a chemical reaction is stated as the change in concentration of a reactant or product per unit of time.

4 Reaction rates are determined experimentally.

5 Collision theory states that atoms, ions, and molecules must collide in order to react. They also must collide with the correct orientation!

6 An activated complex is a temporary, unstable arrangement of atoms in which old bonds are breaking and new bonds are forming.

7 The minimum amount of energy that reacting particles must have to form the activated complex and lead to a reaction is called the activation energy. High activation energy means that few collisions have the required energy and the reaction rate is slow.

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