Rate: temperature (AQA GCSE Chemistry Combined Science): Flashcards
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Effect of temp. on reaction rate
Effect of temp. on reaction rate
Higher temp. = faster reaction rate
Collision theory
Collision theory
Particles must crash with enough energy to react
Activation energy
Activation energy
Minimum energy needed for a reaction to occur
Effect of heating on particle speed
Effect of heating on particle speed
Particles move faster, have more kinetic energy
Effect of temp. on collision frequency
Effect of temp. on collision frequency
Higher temp. = more frequent collisions
Effect of temp. on collision energy
Effect of temp. on collision energy
Higher temp. = higher energy collisions
Why more reactions succeed at higher temp.
Why more reactions succeed at higher temp.
More particles have energy to overcome activation energy
Does activation energy change with temp.?
Does activation energy change with temp.?
No, it stays the same
What changes with temp. regarding energy barrier
What changes with temp. regarding energy barrier
Number of particles with enough energy to overcome it
Effect of temp. on successful collisions
Effect of temp. on successful collisions
Higher temp. = higher proportion of successful collisions
Zn + HCl reaction equation
Zn + HCl reaction equation
Why hot particles react more than cold
Why hot particles react more than cold
They move faster, collide more often and with more energy