HEAT ENERGY TRANSFER
HEAT AND INTERNL ENERGY

HEAT is the measure of the total
kinetic energy of the atoms and
molecules of substance due to its
internal energy

Proportional to mass

Larger mass -- more amount of
heat
Internal energy

The total KE and PE of all atoms
and molecules in a material is
called the internal energy. The
hotter a material, the faster the
particles move, and the more
internal energy it has.

If a hot material is in contact with
a cold material, energy is
transferred = HEAT. The hot
material loses internal energy, the
cold material gains internal energy.
When an object is heated
Measuring the amount of heat energy
Heat transfer

Conduction

Convection

Radiation
conduction
EVAPOURATION

High energy particles leave the
surface

Happens any temperature just
below the boiling point

Leaves low energy particles