Specific latent heat Flashcards
When a substance is melting or boiling…
You are still putting energy and so increasing the internal energy, But the energy is used for breaking intermolecular bonds rather than raising the temperature.
There are flat spots on the heating graph…
Where energy is being transferred by heating but not being used to change the temperature
When a substance is condensing or freezing…
Bonds of forming between particles which releases energy.
This means the internal energy decreases but the…
Temperature doesn’t go down until all the substance has turned into liquid-condensing-or solid-freezing-.
Flat part of the graph show
This energy transfer
Energy needed to change the state of a substance is called
Latent heat
Specific latent heat of a substance is…
Amount of energy needed to change 1 kg of it from one state to another without changing its temperature
For cooling, specific latent heat is the…
Is the energy released by a change in state
Specific latent heat is different for.
Different materials, and for changing between different states
Specific latent heat for changing between a solid and liquid-melting or freezing-is called
Specific latent heat of fusion.
Specific latent heat of a change between liquid and a gas-evaporating boiling or condensing-is called
a specific latent heat of vaporisation
Formula for specific latent heat
Energy divided by mass
Formula for mass
Energy divided by specific latent heat
Formula for energy
Mass times specific latent heat
Energy is given in
J
