C5.2.4 - Particle Size And Reaction Rate Flashcards

1
Q

Why do reactions go faster when the surface area of the solid increases?

A

The particles can only react at the surface as they can’t move, only vibrate, so the more particles on the surface the quicker the reaction

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2
Q

Why do powders react much quicker than huge lumps of reactant?

A

The smaller the pieces of reactants are, the larger the surface area : volume ratio is, which increases rate of reaction

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