Heat Transfer

Heat is energy, internal energy which commonly used to describe the heat of body.
Internal energy is similar to mechanical energy. So, heat can be generated as kinetics energy and potential energy. To differentiate kinetics and potential energy of heat, we can define the principle of potential and kinetics energy itself. Kinetics energy is related to the movement, for heat, the kinetics energy is described by the movement of the particle inside during heating and cooling.
Potential energy is related to the condition, thus potential energy is described by the state changing of a particle.
Energy can not be generated and destroyed, means heat can not be generated nor destroyed. It only moves from one particle to anothe.
There are several ways of heat transfer :

1. Conduction
Conduction is commonly used for all solid matter.
As one matter to other has different amount to absorb heat, we can not assume that the heat transfer for one matter to other will show the same performance.
This will lead to the understanding of conductor and isolator.
Conductor means good in heat transferring, i.e. metal.
Isolator means bad in heat transferring, i.e. wood, plastics.

2. Convection
Convection is commonly used for liquid and gas.
One characteristics of convection is the heat flow.

3. Radiation
Radiation used for gas and or vacuumed condition