Heat Flashcards
(24 cards)
Heat
A form of energy
Materials expand
When heated and contracted when cooled
Above 4 degrees water
Behaves like any other liquid
Below 4 degrees water
Behaves oppositely to other liquids
Reducing pressure
Lowers the boiling point of water below 100 degrees
Temperature
Is a measure of the hotness of the body
When heat causes a change in state and not a change in temperature we call it
Latent heat
When heat changes a solid to a liquid with no temperature change we call it
Latent heat of fusion
When heat changes a liquid to a gas with no change in temperature we call it
Latent hear of vaporisation
Heat can travel by 3 methods
Conduction,convection and radiation
Insulators are materials that are
Poor conductors of heat
Radiation
Radiation is the transfer of heat from a hot object without the need of a medium
Temperature
A measure how hot an object is
Temperature is measure with
The thermometer
We deal with 2 types of a thermometer
Mercury thermometer and a alcohol thermometer
The liquid in the thermometer
Will expand and rise when heated and will contract and fall when cooled
Temperature is measured
Between 0 and (degrees celcius)
Melting point
When a solid turns to a liquid
Boiling point
When a liquid turns to a gas
Freezing point
When a liquid turns to a solid
Condensation
A gas turning to a liquid
Latent heat
The heat taken in or given out when a substance is changing state without it changing temperature
Latent heat of fusion
Used when a solid changes a liquid
Latent heat of vaporisation
Is used when liquid changes to a gas
