Question

The unit of thermal conductivity is

• A. $Jm{K}^{-1}$
• B. $J{m}^{-1}{K}^{-1}$
• C. $Wm{K}^{-1}$
• D. $W{m}^{-1}{K}^{-1}$

Answer 1

The correct option is D $W{m}^{-1}{K}^{-1}$

$\frac{dQ}{dt}=-\left[k\right]A\frac{dT}{dx}\frac{J}{s}=\left(k\right]m^2\frac{K}{m}\therefore \left(k\right]=\frac{J}{Kms}=W{m}^{-1}{K}^{-1}$