Collision Theory & Factors Affecting Reaction Rate

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Presentation transcript:

Collision Theory & Factors Affecting Reaction Rate

Kinetic Molecular Theory The Kinetic Molecular Theory states that: All particles are in constant motion Collisions are happening between Other particles Walls of the container

Rate = collision frequency X fraction effective Collision Theory Not all collisions lead to a reaction, in fact most collisions do not lead to a reaction For a reaction to occur, there must be an effective collision between reactants Correct orientation of molecules Sufficient energy Rate = collision frequency X fraction effective

Correct Orientation

Correct Orientation

Sufficient Energy In most reactions, only a small fraction of the total collisions have sufficient energy to overcome the activation energy (EA) of a reaction Activation energy: the minimum collision energy required for a reaction to occur depends on the kinetic energy of the colliding particles

Maxwell Boltzman Distribution

Potential Energy Diagrams

Consolidate Read p. 383-387 P. 387 #1 Worksheet: Potential energy diagram & factors that affect reaction rate