AQA A-Level Chemistry (new spec)
1.5 Kinetics
What is the collision theory? - Correct Answers-Reactions can only occur when collisions take
place between particles when they have sufficient energy
Define activation energy - Correct Answers-The minimum energy needed for particles to collide
to start a reaction
What does the Maxwell Boltzmann distribution show? - Correct Answers-The spread of
energies that molecules of a gas or liquid have at a particular temperature
Why should the energy distribution go through the origin on the graph? - Correct Answers-
There are no molecules with no energy
What is the Emp? - Correct Answers-Most probable energy
Where is the Emp line on the graph? - Correct Answers-From the peak down to the X-Axis
What does the area under the curve represent? - Correct Answers-The total number of particles
present
Why should the energy distribution never meet the x-axis? - Correct Answers-Because there is
no maximum energy for molecules
What is the label for the y-axis? - Correct Answers-Number of molecules within a given energy
What is the label for the x-axis? - Correct Answers-Energy
What happens to the particles when the temperature is increased? - Correct Answers-More
particles will have energy greater than the activation energy
What does Ea stand for? - Correct Answers-Activation energy
What happens to the peak of the Maxwell Boltzmann distribution when the temperature is
increased? - Correct Answers-It moves to a higher energy with a lower height
1.5 Kinetics
What is the collision theory? - Correct Answers-Reactions can only occur when collisions take
place between particles when they have sufficient energy
Define activation energy - Correct Answers-The minimum energy needed for particles to collide
to start a reaction
What does the Maxwell Boltzmann distribution show? - Correct Answers-The spread of
energies that molecules of a gas or liquid have at a particular temperature
Why should the energy distribution go through the origin on the graph? - Correct Answers-
There are no molecules with no energy
What is the Emp? - Correct Answers-Most probable energy
Where is the Emp line on the graph? - Correct Answers-From the peak down to the X-Axis
What does the area under the curve represent? - Correct Answers-The total number of particles
present
Why should the energy distribution never meet the x-axis? - Correct Answers-Because there is
no maximum energy for molecules
What is the label for the y-axis? - Correct Answers-Number of molecules within a given energy
What is the label for the x-axis? - Correct Answers-Energy
What happens to the particles when the temperature is increased? - Correct Answers-More
particles will have energy greater than the activation energy
What does Ea stand for? - Correct Answers-Activation energy
What happens to the peak of the Maxwell Boltzmann distribution when the temperature is
increased? - Correct Answers-It moves to a higher energy with a lower height
