ABSTRACT
The chapter describes the three main methods of heat transfer, namely conduction, convection and radiation, together with their uses. Heat is a form of energy and is measured in joules. The specific latent heat of fusion is the heat required to change 1 kg of a substance from the solid state to the liquid state at constant temperature. Temperature is the degree of hotness or coldness of a substance. A thermometer is an instrument that measures temperature. The boiling point of most liquids may be lowered if the pressure is lowered. Conduction is the transfer of heat energy from one part of a body to another without the particles of the body moving. Convection is the transfer of heat energy through a substance by the actual movement of the substance itself. Radiation is the transfer of heat energy from a hot body to a cooler one by electromagnetic waves.
