Calculating electron mobility in a rod

[LucosidE]

Studying for final, this is one of the suggested questions, I have no idea how to approach it.

Homework Statement

A cylindrical aluminum rod of 2 mm in diameter and 5 cm in length has a thermal conductivity of 237 W m-1 K-1 at 300 K. Calculate the electron mobility in the rod if aluminum has 3 valence electrons per atom, density of 2.7 g cm-3 and atomic mass of 26.98.

Homework Equations

The way i see it is i need to calculate conductance and then drift mobility
n=3d*Na/Ma
c = e*n*Md

trying to find Md

The Attempt at a Solution

I can find the number of electrons/cm^-3
but i have no idea where to go from there.

How is electrical conductivity dependent on thermal conductivity??

 

[_coyote_]

To calculate electron mobility, you need to first calculate the electrical conductivity. The electrical conductivity can be calculated using the number of electrons per atom, the atomic mass, and the density. You can then use the thermal conductivity to calculate the drift mobility, which is the ratio of electrical conductivity to thermal conductivity.