Thermal

Question 1

Internal energy of a body

Answer 1

The sum of the randomly distributed kinetic and potential energies of all the particles in the body.

Question 2

Specific heat capacity, c, of a substance

Answer 2

The amount of energy needed to raise the temperature of 1 kg of the substance by 1 K.
J kg-1 K-1

Question 3

Specific latent heat, l, of fusion or vaporisation

Answer 3

The quantity of thermal energy required to change the state of 1 kg of a substance.

lv = l of vaporisation (melting/freezing)
lf = l of fusion (boiling/condensing)

Question 4

Boyle’s law

Answer 4

pV = constant

Question 5

Charles’s law

Answer 5

V/T = constant

Question 6

The pressure law

Answer 6

P/T = constant

Question 7

Molecular mass

Answer 7

The sum of the masses of all the atoms that make up a molecule.

Question 8

Molar mass

Answer 8

The mass that 1 mole of that substance would have. It is equal to the relative atomic mass of that substance.

Question 9

Boltzmann’s constant, k

Answer 9

The gas constant for one particle of gas.

R = gas constant for 1 mol of gas

Question 10

Mean square speed

Answer 10

The average of the square speeds of ALL the particles.
So the square of this gives you the typical speed (rms speed).
Has units of m2 s-2
Is the same as (Crms)^2