Rates of Reaction and Factors Affecting Rate (Grade 12 NSC Matric Physical Sciences): Flashcards
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Reaction rate
Reaction rate
How quickly reactants consumed or products formed
Collision theory
Collision theory
Particles must collide with correct energy & orientation
Requirements for successful collision
Requirements for successful collision
Collide, sufficient energy, correct orientation
Catalyst
Catalyst
Increases rate, lowers activation energy, not consumed
Effect of increased surface area
Effect of increased surface area
Increases reaction rate
Effect of increased concentration
Effect of increased concentration
Increases reaction rate
Effect of increased temperature
Effect of increased temperature
Increases reaction rate
Effect of increased pressure (for gases)
Effect of increased pressure (for gases)
Increases reaction rate
Why smaller pieces react faster
Why smaller pieces react faster
Greater surface area, more particles exposed for collision
How catalyst speeds up reaction
How catalyst speeds up reaction
Provides alternative pathway with lower activation energy