Factors that Affect the Rate of Reaction (AQA GCSE Chemistry): Flashcards
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13 cards from this deck
What does rate of reaction describe?
What does rate of reaction describe?
How fast or slow a reaction occurs
3 main factors affecting reaction rate
3 main factors affecting reaction rate
Temperature, pressure, concentration
2 additional factors affecting reaction rate
2 additional factors affecting reaction rate
Surface area and catalyst
Theory explaining how factors affect reaction rate
Theory explaining how factors affect reaction rate
Collision theory
Effect of increasing temperature on reaction rate
Effect of increasing temperature on reaction rate
Particles move faster, collide more, reaction speeds up
Effect of increasing pressure on gas reaction rate
Effect of increasing pressure on gas reaction rate
Particles closer, collide more frequently, reaction speeds up
Effect of increasing concentration on reaction rate
Effect of increasing concentration on reaction rate
More particles present, more collisions, reaction speeds up
Which particles in a solid can collide with reactants?
Which particles in a solid can collide with reactants?
Only particles on the surface
Effect of increased surface area on reaction rate
Effect of increased surface area on reaction rate
More particles exposed, more collisions, reaction speeds up
Formula for surface area-to-volume ratio
Formula for surface area-to-volume ratio
What do catalysts do to reactions?
What do catalysts do to reactions?
Speed up reactions without being consumed
How do catalysts speed up reactions?
How do catalysts speed up reactions?
Provide alternative pathway with lower activation energy
Are catalysts consumed in the reaction?
Are catalysts consumed in the reaction?
No