What is the transfer of heat through matter?

Heat is transferred through matter by conduction Ttemperature is the unique physical property that determines the direction of heat flow between two objects placed in thermal contact. If no heat flow occurs, the two objects have the same temperature; otherwise heat flows from the hotter object to the colder object Heat transfer is the passage of thermal energy from a hot to a colder body. When a physical body is at a different temperature than its surroundings or another body, heat transfer occurs in such a way that the body and the surroundings reach thermal equilibrium.

Heat transfer always occurs from a hot body to a cold one.

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