3.3 - specific latent heat

what is the energy measured in for specific latent heat?

joules per kilogram (J/Kg)

what is the formula for specific latent heat?

energy (e) = mass (m) x specific Latent Heat (s)

what is the mass measured in?

kilograms (kg)

what happens when a substance reaches its melting or boiling point?

the energy is used to weaken or break the bonds holding the particles together

what happens when a substance is cooling to change state?

there is a formation of new bonds which release energy. this counteracts the cooling to keep the temperature constant

what does specific latent heat depend on?

type of substance and the amount

what is specific latent heat?

the energy required to change 1kg of a substance from one state to another without changing the temperature

what is the specific latent heat for cooling?

the energy released by a change in state

what is the specific latent heat of vaporisation?

energy change when a substance changes between a liquid + gas

what is the specific latent heat of fusion?

energy change when a substance changes between a solid + liquid