Principle

The thermal conductivity of copper and aluminium is determined
in a constant temperature gradient from the calorimetrically
measured heat flow. The electrical conductivity of copper and
aluminium is determined and the Wiedmann-Franz law is tested.

Benefits


Measurement of electrical and thermal conductivity in one set-up

Compact, easily transportable setup



Tasks


Determine the heat capacity of the calorimeter in a mixture
experiment as a preliminary test. Measure the calefaction of water
at a temperature of 0 °C in a calorimeter due to the action of the
ambient temperature as a function of time.

To begin with, establish a constant temperature gradient in a
metal rod with the use of two heat reservoirs (boiling water and
ice water). After removing the pieces of ice, measure the
calefaction of the cold water as a function of time and determine
the thermal conductivity of the metal rod.

Determine the electrical conductivity of copper and aluminium
by recording a current-voltage characteristic line.

Test of the Wiedmann-Franz law.


What you can learn about


Electrical conductivity

Wiedmann-Franz law

Lorenz number

Diffusion

Temperature gradient

Heat transport

Specific heat

Four-point measurement