Principle

A stream of gas is fed to a throttling point, where the gas
(CO2 or N2) undergoes adiabatic expansion.
The differences in temperature established between the two sides of
the throttle point are measured at various pressures and the
Joule-Thomson coefficients of the gases in question are
calculated.

Benefits


For both demonstration and student experiments

With detailed experiment guide

Affordable set-up



Tasks


Determination of the Joule-Thomson coefficient of CO2.

Determination of the Joule-Thomson coefficient of N2.


What you can learn about


Real gas

Intrinsic energy

Gay-Lussac theory

Throttling

Van der Waals equation

Van der Waals force

Inverse Joule-Thomson effect

Inversion temperature