19 - 20 Thermal Physics + Gases Definitions

Question 1

internal energy

Answer 1

the sum of the random distribution of kinetic and potential energies of molecules in a body

Question 2

specific heat capacity

Answer 2

the energy required to increase the temperature of one kg of a substance by one Kelvin, without change in state

Question 3

latent heat of fusion

Answer 3

the energy required to change the phase of a substance from solid to liquid with no change in temperature

Question 4

specific latent heat of fusion

Answer 4

the energy required to change the phase of one kg of a substance from solid to liquid with no change in temperature

Question 5

specific latent heat of vaporisation

Answer 5

the energy required to change the phase of one kg of a substance from liquid to gas with no change in temperature

Question 6

melting point

Answer 6

the temperature at which a solid becomes a liquid

Question 7

boiling point

Answer 7

the temperature at which a liquid becomes a gas

Question 8

sublimation

Answer 8

the process by which a solid vaporises directly into a gas when heated

Question 9

Boyle’s law

Answer 9

at a constant temperature, the pressure and volume of a gas are inversely proportional

Question 10

Charles’ law

Answer 10

at a constant pressure, the volume and temperature of a gas are directly proportional

Question 11

Pressure law

Answer 11

at a constant volume, the pressure and temperature of a gas are inversely proportional