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AQA A Level Chemistry > Kinetics > Flashcards

Flashcards in Kinetics Deck (9)
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1
Q

How does a Maxwell-Boltzmann curve change when the temperature is increased?

A
More particles with the activation energy
Curve shifts (stretched) to right
2
Q

How does a Maxwell-Boltzmann curve change when half the molecules are removed?

A

The curve is lower/flatter

The Ea will decrease

3
Q

How does a Maxwell-Boltzmann curve change when a catalyst is added?

A

The curve stays the same

The number of particles with Ea increases

4
Q

How does a Maxwell-Boltzmann curve change when the volume of the container is reduced?

A

Same curve

Same number of particles with Ea

5
Q

How does a Maxwell-Boltzmann curve change when you reduce temperature?

A

The curve is ‘squished’ to the left

Fewer particles with Ea

6
Q

How does a Maxwell-Boltzmann curve change when you add an inert gas?

A

It doesn’t

7
Q

Describe what a catalyst is and explain how it works

A

A substance that increases the rate of reaction without being changed in chemical composition or amount itself
They work by providing an alternative reaction route which has a lower activation energy

8
Q

State what is meant by the term ‘activation energy’

A

Reactions can only occur when collisions take place
between particles having sufficient energy.
This energy is called the activation energy

9
Q

State what is meant by the term rate of reaction

A

The speed at which a chemical reaction proceeds