AQA Physics A Level - Thermal Energy

Question 1

Collisions in an Ideal Gas are elastic and take zero time.

Accepted Answer

True

Question 2

How do you calculate the change in thermal energy?

Accepted Answer

Q = mc∆θ

Question 3

What unit must be used for all thermal physics questions?

Accepted Answer

Kelvin

Question 4

What is the Root Mean Squared?

Accepted Answer

The sum of the squares of velocities / number of particles

Question 5

The internal energy in a system with constant temperature does what?

Accepted Answer

Remain the Same

Question 6

What is the equation for molecular kinetic energy.

Accepted Answer

½ m crms2 = 3/2 kT

Question 7

Which is a possible statement of Charles' Law?

Accepted Answer

V1/T1=V2/T2

Question 8

Describe the shape of the Maxwell-Boltzmann distribution.

Accepted Answer

Bell curve with longer tail towards higher energies.

Question 9

How many ideal gas laws have we studied?

Accepted Answer

3

Question 10

Answer this past exam question.

Accepted Answer

pV = nRT

Question 11

What will happen in regards to energy during collisions of gas particles with a container?

Accepted Answer

Kinetic energy is conserved in the collision

Question 12

What is Specific Heat Capacity?

Accepted Answer

Amount of energy to raise temperature of 1kg by 1K

Question 13

One ideal gas law is that the particles have no mass.

Accepted Answer

False

Question 14

Both pressure and volume are proportional to temperature.

Accepted Answer

True

Question 15

Rearrange pV = NkT to get T.

Accepted Answer

T = pV/Nk

Question 16

What number do you add to Celsius to get Kelvin?

Accepted Answer

273

Question 17

Answer this past exam question.

Accepted Answer

Volume decreases (V ∝ T since p and n constant)

Question 18

For a gas there are no molecules with 0 energy and only few molecules have high energies

Accepted Answer

True

Question 19

Is this the Maxwell Boltzmann Distribution Curve?

Accepted Answer

Yes, Of course!

Question 20

What is the internal energy of a substance?

Accepted Answer

The sum of the kinetic and potential energies.

Questions 20