Why hydrogen and helium does not satisfy joule Thomson effect?

Answer 1

As the gs flow from high pressure to low pressur using the porus plug the temperature of the gas increases as the pressure of the gas decreases.

As we know in all this process the enthalpy is constant . So, to stay it constant the internal energy increases which lead to increase in temperature of the gas.

Formula h=u+pv

h--- enthalpy

u-- internal energy

p--pressure

v---volume

Answer 2

Hydrogen and helium do not satisfy the Joule-Thomson effect because they have low intermolecular forces, leading to weak interactions between molecules. This results in minimal cooling or heating when subjected to pressure changes, which is a key requirement for the Joule-Thomson effect to occur effectively. As a result, hydrogen and helium do not exhibit significant temperature changes under such conditions.