Question

In an experiment to determine the thermal conductivity of a bar of new alloy, one end of the bar is maintained at 0 °C and the other end at 100 °C. The bar has a cross-sectional area of 1.0 cm2 and a length of 15 cm. If the rate of heat conduction through the bar is

34 W, what is the thermal conductivity of the bar?

Answer 1

$\frac{Q}{\Delta\>t}=\frac{K A\Delta\>T}{\Delta\>x}$

$34=\frac{K(1×10^{-4})×(100-0)}{15×10^{-2}}$

$K=510w\>m^{-1}K^{-1}$