Question

What is Joule Thomson Effect?

Answer 1

The Joule-Thomson effect was discovered and studied by the British physicists J. Joule and W. Thomson. This describes the change in the temperature of a real gas or a liquid when allowed to expand freely through a valve or other throttling device while kept insulated so that no heat is transferred to or from the fluid, and no external mechanical work is extracted from the fluid.

This effect does not apply for ideal gases as there is no temperature change when an ideal gas is allowed to expand through an insulated throttling device.