Collision Theory & Activation Energy (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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9 cards from this deck
Collision Theory
Collision Theory
Explains how/why reactions occur via particle collisions
Requirements for successful collision
Requirements for successful collision
Enough energy & right direction
Successful collision
Successful collision
Collision w/ enough energy to break bonds & form new products
Successful collision frequency & reaction rate
Successful collision frequency & reaction rate
More frequent successful collisions = faster reaction
Activation energy
Activation energy
Minimum energy needed for particles to collide successfully
Activation energy as barrier
Activation energy as barrier
Energy barrier that must be overcome for reaction to happen
What if particles lack enough energy?
What if particles lack enough energy?
They 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