Collision Theory & Activation Energy (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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Collision Theory
Collision Theory
Explains how & why chemical reactions happen
Basic requirement for reaction to occur
Basic requirement for reaction to occur
Particles must collide
Energy requirement for successful collision
Energy requirement for successful collision
Particles hit with enough energy
Direction requirement for successful collision
Direction requirement for successful collision
Particles hit in the right direction
Successful collision
Successful collision
Collision with enough energy to break bonds & form new ones
Rate of reaction depends on
Rate of reaction depends on
Frequency of successful collisions
Effect of more frequent successful collisions
Effect of more frequent successful collisions
Faster reaction
Activation energy
Activation energy
Minimum energy needed for particles to collide successfully
Activation energy as a barrier
Activation energy as a barrier
Energy barrier that must be overcome for reaction
Result when particles lack enough energy
Result when particles lack enough energy
They bounce off without reacting
Effect of low activation energy
Effect of low activation energy
Reaction happens more quickly; more particles have enough energy
Effect of high activation energy
Effect of high activation energy
Reaction is slower; fewer particles overcome barrier