Edexcel Physics A Level - Thermal Energy

Question 1

What unit must be used for ALL Thermal Physics Questions?

Accepted Answer

Kelvin

Question 2

Answer this past exam question.

Accepted Answer

pV = nRT

Question 3

True or False: ‘’One Ideal Gas Law is that the particleshave no mass.’’

Accepted Answer

False

Question 4

Describethe shape of the Maxwell Boltzmann Distribution Graph.

Accepted Answer

Bell curve with longer tail towards higher energies.

Question 5

Is this the Maxwell Boltzmann Distribution Curve?

Accepted Answer

Of course!, Yes

Question 6

What is the Internal Energy?

Accepted Answer

The sum of the kinetic andpotential energies.

Question 7

How much do you add to Celsius to get Kelvin

Accepted Answer

273.15

Question 8

Rearrange pV = NkT to get T.

Accepted Answer

T = pV/Nk

Question 9

The Total Energy in the system with constanttemperature does what?

Accepted Answer

Remain the Same

Question 10

Trueor False: ‘’There are no molecules with 0 energy and only few moleculeshave high energies’’

Accepted Answer

True

Question 11

Answer this past exam question.

Accepted Answer

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

Question 12

State the Equation forMolecular Kinetic Energy.

Accepted Answer

½ m <c2> = 3/2 kT

Question 13

What types of collisions happen in the same direction?

Accepted Answer

Shunts.

Question 14

What is Charles’ Law?

Accepted Answer

V1/T1=V2/T2

Question 15

What will happen in regards to energy duringcollisions of gas particles?

Accepted Answer

Energy is transferred between the particles.

Question 16

How many Ideal Gas Laws are there?

Accepted Answer

5

Question 17

True or False: ‘’Collisions in an Ideal Gas areelastic and take zero time.''

Accepted Answer

True

Question 18

What is Specific Heat Capacity?

Accepted Answer

Minimum amount ofenergy to raise temperature of 1kg by 1K

Question 19

True or False: ‘’Both Pressure and Volume areProportional to Temperature!’’

Accepted Answer

True

Question 20

What is the Root Mean Squared?

Accepted Answer

The sum of the squares of velocities / number ofparticles

Question 21

How do you calculate the change in Thermal Energy?

Accepted Answer

∆E=mc∆θ

Questions 21