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It is the temperature difference between the two neighboring objects that causes this heat transfer The heat transfer continues until the two objects
Temperature is a measure of the average kinetic energy of the atoms or molecules of a substance • Heat is the transfer of energy from a substance at a higher
RADIATION – This is the only form of heat transfer that does not require contact between substances No contact is required because the energy is
Conduction is the transfer of energy from the more energetic particles of a substance to the adjacent less energetic ones as result of interactions between the
It makes a substance hotter Conduction 2 Convection and 3 Radiation In solids, heat passes from one point to another through conduction
movement of heat between two materials that are touching convection Ask students why they might want to know the thermal conductivity of a substance
Temperature difference between the source of heat and the receiver of heat is The radiant energy transferred between two surfaces depends upon their
heat is usually transferred by convection, in which the motion of the gas or rather is a transfer of energy within a substance (or between substances in
movement of heat between two materials that are touching higher the thermal conductivity, the faster heat is transferred through the substance Air has a
It makes a substance hotter We cannot In solids, heat passes from one point to another through conduction Figure 2 : Heat Transfer in water by convection
rather is a transfer of energy within a substance (or between substances in contact) The third kettle, the heat is transferred through convection from the fire to the pot Heat is What differences do you feel when the two liquids evaporate ?
increasing the internal energy through heat transfer (e g the discussion to heat transfer (W=0) As the temperature of substance passes through certain