Thermal conductivity meaning
What is Thermal conductivity:
Thermal conductivity is a physical property of materials or bodies that determines the ability to transport heat by conduction directly and without material exchange.
Each matter has a specific thermal conductivity that characterizes the transport of heat, which always flows spontaneously and from higher to lower temperature. Therefore, heat is transported from one body to another body that is at a lower temperature.
Bodies are made up of atoms and molecules, therefore, when one body is hot, its atoms and molecules move quickly and transport their energy to the other less hot body. It is a continuous energy transport until the object reaches thermal equilibrium.
Consequently, transporting heat from one matter or body to another also involves an energy exchange, in this case kinetic energy is produced (energy that a body possesses according to its movement).
However, there are bodies or materials whose thermal conductivity is low and the inverse property of conductivity is generated, which is thermal resistivity. That is, the lower the thermal conductivity, the greater the heat insulation, for example, metals have higher electrical conductivity than gases.
See also the meaning of Conductivity.
Electrical conductivity is the ability of bodies or materials to transport electrical energy from one body to another. On the contrary, thermal conductivity carries heat.