Question

What is the unit of the coefficient of thermal conductivity K?

Answer 1

Determine the unit of the coefficient of thermal conductivity K.

1. A rate of heat transport per unit area per unit temperature difference across a solid is equivalent to the material's thermal conductivity coefficient.
2. A coefficient of thermal conductivity of a substance is defined as the total amount of heat that passes in one second across the opposing sides of a unit cube whose faces are kept so at a temperature difference of $1°C$.
   Hence, the unit of the coefficient of heat conductivity K is $"\frac{W}{m^1{k}^1}"$.