Factors that Affect the Rate of Reaction (Edexcel GCSE Chemistry): Flashcards
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Rate of reaction definition
Rate of reaction definition
How fast or slow a chemical reaction occurs
Main 3 factors affecting rate of reaction
Main 3 factors affecting rate of reaction
Temperature, pressure, concentration
Two additional factors affecting reaction rate
Two additional factors affecting reaction rate
Surface area and catalyst
Theory explaining particle collisions and reaction rate
Theory explaining particle collisions and reaction rate
Collision theory
Effect of increasing temperature on reaction rate
Effect of increasing temperature on reaction rate
Increases rate (more frequent & energetic collisions)
Effect of increasing pressure (in gas reactions)
Effect of increasing pressure (in gas reactions)
Increases rate (particles closer together, more collisions)
Effect of increasing concentration on reaction rate
Effect of increasing concentration on reaction rate
Increases rate (more particles, more collisions)
Why only surface particles matter in solid reactions
Why only surface particles matter in solid reactions
Only particles on the surface can collide with other reactants
Effect of breaking solid into smaller pieces
Effect of breaking solid into smaller pieces
Increases surface area, speeds up reaction
Surface area-to-volume ratio formula
Surface area-to-volume ratio formula
Effect of higher surface area-to-volume ratio
Effect of higher surface area-to-volume ratio
Faster reaction (more particles available for collisions)
How catalysts speed up reactions
How catalysts speed up reactions
Provide alternative pathway with lower activation energy (not consumed)