Kinetics

Question 1

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

Answer 1

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

Question 2

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

Answer 2

The curve is lower/flatter
The Ea will decrease

Question 3

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

Answer 3

The curve stays the same
The number of particles with Ea increases

Question 4

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

Answer 4

Same curve
Same number of particles with Ea

Question 5

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

Answer 5

The curve is ‘squished’ to the left
Fewer particles with Ea

Question 6

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

Answer 6

It doesn’t

Question 7

Describe what a catalyst is and explain how it works

Answer 7

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

Question 8

State what is meant by the term ‘activation energy’

Answer 8

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

Question 9

State what is meant by the term rate of reaction

Answer 9

The speed at which a chemical reaction proceeds