internal energy and latent heat

internal energy increases if

either the kinetic or potential energy of the particles increase

internal energy - if the temperature increases

the kinetic energy increases

internal energy - if the particles are pulled further apart

the potential energy increases

this happens during a change of state

internal energy - gas pressure increases if

temperature increases

particles have more kinetic energy so they move faster

• more frequent collisions within the container

• collisions have more force

latent heat - melting

temperature doesnt change

latent heat is the energy to change state

latent heat - boiling

temperature doesnt change

latent heat - solid

the temperature is rising

latent heat - liquid

the temperature is rising

latent heat - vaporisation

the temperature is rising

energy needed to melt 1kg of a substance

334,000 joules

energy needed to boil 1kg of a substance

227 kj