• Heat energy cannot be destroyed.
• Heat always flows from a higher temperature substance to a lower temperature substance.
• Heat can be transferred from one substance to another.
Heat is a form of energy which transfers or flows takes place between bodies which are kept under thermal interactions. According to Second Law Of Thermodynamics, heat transfer or flows from a body at higher temperature to a lower body temperature.When a temperature difference occurs between two bodies or a body with its surroundings, heat transfer occurs. Following are the different modes of heat transfer. Heat transfer occurs basically in three modes:
1.Conduction
2.Convection and
3.Radiation.
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