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C18 - Factors affecting reaction rates

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Section 1

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Why does increased pressure increase reaction rates?

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6 years ago

Date created

Mar 14, 2020

Cards (8)

Section 1

(8 cards)

Why does increased pressure increase reaction rates?

Front

Because particles are squeezed closer together, so collisions occur more often.

Back

Why does concentration increase rate of reaction?

Front

There are more reacting particles in the same volume so collisions occur more often.

Back

For chemical reactions to occur...

Front

Particles must bump into each other with enough energy

Back

activation energy

Front

Energy needed to get a reaction started

Back

Why does increased temperature increase reaction rates?

Front

The reactant particles speed up and have more energy, therefore colliding more often and having enough energy to react.

Back

Endothermic reaction

Front

A reaction in which energy is absorbed

Back

Why does increased surface area increase rate of reaction?

Front

There is more surface for substances to collide on, so it reacts faster.

Back

exothermic reaction

Front

a chemical reaction in which heat is released to the surroundings

Back