Basic Knowledge of Heat Transfer - Conduction


Conductors and insulators

Substances through which heat can pass easily are called good conductors of heat. Examples: metals, mercury, etc.
Substances through which heat cannot pass easily are called insulators of heat. Examples: glass, wool, etc.


Heat conduction on kinetic model of matter

Conduction is the process of heat transmission in which heat energy is transferred from one atom or molecule to another. Heat generally tranfers in the direction of higher to lower temperature without the actual movement of the atoms or molecules from their mean positions.
In the transfer of heat due to conduction, particles (atoms or molecules) of the medium do take part in the process as they vibrate about their mean positions, but there is no net displacement in them.