Collision Theory & Activation Energy (Edexcel GCSE Chemistry): Flashcards
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What does Collision Theory explain?
What does Collision Theory explain?
How and why chemical reactions happen
What must reactant particles do for a reaction to occur?
What must reactant particles do for a reaction to occur?
Collide with each other
Two requirements for particles to react upon collision
Two requirements for particles to react upon collision
Enough energy and right direction
Definition of a successful collision
Definition of a successful collision
Collision w/ enough energy to break bonds & form new ones
What determines the rate of reaction?
What determines the rate of reaction?
Frequency of successful collisions
Effect of more frequent successful collisions
Effect of more frequent successful collisions
Faster reaction
Definition of Activation Energy
Definition of Activation Energy
Minimum energy needed for particles to react successfully
Activation Energy metaphor
Activation Energy metaphor
Energy barrier that must be overcome
What happens if particles lack enough energy?
What happens if particles lack enough energy?
Bounce off each other without reacting
Why low activation energy reactions are faster
Why low activation energy reactions are faster
More particles have enough energy to collide successfully
Why high activation energy reactions are slower
Why high activation energy reactions are slower
Fewer particles can overcome the energy barrier