10. Thermal and electrical
1
conductivity of a solid is same
in different directions. Name
the phenomenon involved. *
Answers
Explanation:
When a system gains heat, it stores some of its heat energy and transports the remaining heat energy to some other system. The ability of a system to transport heat energy is referred to as Thermal conductivity of the system. Basically, it is a Transport property of a system.
Thermal conductivity is represented by k. The unit of thermal conductivity as we have seen earlier is W/m*K.
Before analyzing thermal conductivity for different phases, let us look at the phenomena which govern heat conduction through solids, liquids, and gases.
In solids, heat can be conducted through two mechanisms. First is lattice vibrations and the second is Flow of free electrons. Increased lattice vibrations facilitate the transport heat energy through the medium. The flow of free electrons increases electrical conductivity. This also helps in the process of diffusion of heat energy through the medium.