Factors that Affect the Rate of Reaction (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
ShowHide
Practise the cards
13 cards from this deck
What does rate of reaction measure?
What does rate of reaction measure?
How fast or slow a reaction occurs
3 main factors affecting reaction rate
3 main factors affecting reaction rate
Temperature, pressure, concentration
2 other factors affecting reaction rate
2 other factors affecting reaction rate
Surface area and catalysts
Theory explaining reaction rate via collisions
Theory explaining reaction rate via collisions
Collision theory
Effect of increasing temperature on rate
Effect of increasing temperature on rate
Increases - particles move faster, collide more often
Effect of increasing pressure (gases)
Effect of increasing pressure (gases)
Increases rate - particles closer, more collisions
Effect of increasing concentration
Effect of increasing concentration
Increases rate - more particles, more collisions
Why surface area matters in solid reactions
Why surface area matters in solid reactions
Only surface particles can collide with reactants
How to increase surface area of solid
How to increase surface area of solid
Break into smaller pieces or crush to powder
Effect of higher surface area:volume ratio
Effect of higher surface area:volume ratio
More exposed particles → faster reaction
Surface area-to-volume ratio formula
Surface area-to-volume ratio formula
How catalysts increase reaction rate
How catalysts increase reaction rate
Provide alternative pathway with lower activation energy
Are catalysts consumed during reaction?
Are catalysts consumed during reaction?
No - remain unchanged after reaction