Kinetics

What is activation energy?
The minimum amount of energy required for a reaction to take place
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What must happen for a successful collision to occur?
Particles in correct orientation with energy equal to/more than the activation energy
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How does increasing concentration affect rate of reaction?
Number of particles per unit volume increases therefore increasing the number of successful collisions
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How does increasing temperature affect rate of reaction?
Particles have more energy higher than Ea and more speed, therefore increasing the probability of successful collisions
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How does increasing pressure affect rate of reaction?
Number of particles per volume increases, therefore increasing the probability of successful collisions
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How does increasing surface area affect rate of reaction?
More particles are available to react, therefore increasing the probability of successful collisions occurring
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What is a catalyst?
A substance which lowers the Ea and increases rate of reaction without being involved itself
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How does a catalyst affect rate of reaction?
Provides an alternative route for the reaction to take place with lower Ea
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What is a catalytic converter?
Honeycomb catalyst in cars which converts harmful products into less harmful products
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What two stages are involved in using a catalyst?
Adsorption and desorption
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How does a chlorine atom catalyst affect the ozone layer?
Reacts with oxygen and ozone to form 2 molecules of O2 - breaking down the ozone layer. Also creates a chlorine free radical which creates a chain reaction
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What does the area under a Maxwell-Boltzmann graph represent?
The number of particles
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How does increasing the temperature affect the graph?
Moves line right and lower
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What does the peak represent on the graph?
The most probable energy (energy that most particles have)
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At what point on the graph are the particles which can react?
Those in the space to the right of the Ea line
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Other cards in this set

Card 2

Front

What must happen for a successful collision to occur?

Back

Particles in correct orientation with energy equal to/more than the activation energy

Card 3

Front

How does increasing concentration affect rate of reaction?

Back

Preview of the front of card 3

Card 4

Front

How does increasing temperature affect rate of reaction?

Back

Preview of the front of card 4

Card 5

Front

How does increasing pressure affect rate of reaction?

Back

Preview of the front of card 5
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