Collision Theory & Activation Energy (Edexcel GCSE Chemistry Combined Science): Flashcards
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What is Collision Theory?
What is Collision Theory?
Particles must collide for a reaction to occur
Requirements for particles to react
Requirements for particles to react
Enough energy and right direction
What is a successful collision?
What is a successful collision?
Collision with enough energy to break bonds & form new ones
What determines rate of reaction?
What determines rate of reaction?
Frequency of successful collisions
Effect of more frequent successful collisions
Effect of more frequent successful collisions
Faster reaction
What is Activation Energy?
What is Activation Energy?
Minimum energy needed for particles to react successfully
Describe activation energy as a barrier
Describe activation energy as a barrier
Energy barrier that must be overcome for reaction to happen
What happens if particles lack enough energy?
What happens if particles lack enough energy?
They bounce off without reacting
Why are low activation energy reactions faster?
Why are low activation energy reactions faster?
More particles have enough energy to collide successfully
Why are high activation energy reactions slower?
Why are high activation energy reactions slower?
Fewer particles can overcome the energy barrier