M5- C14

Question 1

Triple point

Answer 1

For a given substance, one specific temperature and pressure at which all three phases of that substance can exist in thermodynamic equilibrium

Question 2

Zeroth law of thermodynamics

Answer 2

If two objects are in thermal equilibrium with a third, then all three are in thermal equilibrium with each other.

Question 3

Celsius scale

Answer 3

A temperature scale with 100° between the freezing point and the boiling point of pure water

Question 4

Kinetic model

Answer 4

Describes how all substances are made up of atoms or molecules, which are arranged differently depending on the phase of the substance.

Question 5

Absolute zero

Answer 5

The lowest possible temperature, the temperature at which substances have minimum internal energy

Question 6

Internal energy

Answer 6

The some of the randomly distributed kinetic and potential energy of atoms or molecules within the substance

Question 7

Specific heat capacity

Answer 7

The energy required per unit mass to change the temperature by one Kelvin and has units of JKg-1K-1

Question 8

Specific latent heat

Answer 8

The energy required to change the phase per unit mass while at constant temperature

Question 9

Specific latent heat of fusion

Answer 9

The energy required to change unit mass of a substance from solid to liquid while at constant temperature

Question 10

Specific latent heat of vaporisation

Answer 10

The energy required to change unit mass of a substance from liquid to gas while at constant temperature