Heat

Question 1

Temperature

Answer 1

the measure of the hotness or coldness of a body

Question 2

Thermometric property

Answer 2

Any physical property that changes measurably with temperature.

Question 3

Examples of thermometric properties

Answer 3

Length of a column of liquid
electrical resistance
Emf of a thermocouple
Colour

Question 4

Heat capacity

Answer 4

The heat energy needed to change its temperature by 1K

Question 5

Specific heat capacity

Answer 5

The heat energy needed to change the temperature of one kilogram of that substance by 1K

Question 6

Latent heat (L)

Answer 6

the heat energy needed to change its state without a change in temperature

Question 7

Specific latent heat

Answer 7

the amount of heat energy needed to change the state of 1 kg of a substance without a change in temperature

Question 8

Specific latent heat of fusion

Answer 8

the amount of heat energy needed to change 1 kg of that substance from a solid to a liquid without a change in temperature (melting point)

Question 9

Specific latent heat of vaporisation

Answer 9

the amount of heat energy needed to change 1 kg of that substance from a liquid to gas without a change in its temperature ( boiling point)

Question 10

Formula for latent heat

Answer 10

Q=ml
Q- heat energy
m- mass
l- specific latent heat of fusion/ vaporisation

Question 11

Conduction

Answer 11

The movement of heat energy through solids by the vibration of heated molecules. there is no overall motion of the substance

Question 12

U-Value

Answer 12

the u-value of a structure is the amount of heat energy conducted per second through 1m squared of that structure when a temperature difference of 1C is maintained between its ends.

Question 13

Radiation

Answer 13

Th transfer of heat energy from one place to another in the form of electromagnetic waves

Question 14

convection

Answer 14

The transfer of heat through a fluid by means of circulating currents of fluid caused by the heat