rates

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  • Created by: faye
  • Created on: 26-05-13 20:59
How is the rate of a reaction measured?
the time taken for the reactants to be used up or products to be made
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What happens during a chemical reaction?
reactants react to form products
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what are broken in the reactants and made in the product?
bonds
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what do particles need to do in order to react?
collide
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What is it called when particles need to collide with enough energy?
activation energy
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how do you increase the rate of reaction?
increasing the surface area, concentration, the amount of pressure in gasses, temperature, catalyst
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what does increasing the surface area do?
increases the frequency of collisions because there are more particles available to react
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Concentration?
more particles in the same volume
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pressure?
the particles are in a smaller volume
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temperature?
the particles are moving faster
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why does increasing temperature increase number of successful collisions?
more particles have more energy than the activation energy
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adding a catalyst?
increases the rate of reaction without being used up in the reaction
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how does a catalyst work?
increases the rate of reaction by finding an alternative pathway that has lower activation energy
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Other cards in this set

Card 2

Front

What happens during a chemical reaction?

Back

reactants react to form products

Card 3

Front

what are broken in the reactants and made in the product?

Back

Preview of the front of card 3

Card 4

Front

what do particles need to do in order to react?

Back

Preview of the front of card 4

Card 5

Front

What is it called when particles need to collide with enough energy?

Back

Preview of the front of card 5
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