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(C) Helium behaves as a non-ideal gas.When helium gas is allowed to expand into a vacuum,a heating effect is observed.This occurs because the inversio

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The inversion temperature of helium is very low

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(C) Helium behaves as a non-ideal gas.When helium gas is allowed to expand into a vacuum,a heating effect is observed.This occurs because the inversion temperature $(T_i)$ of helium is very low (approximately $-240 \ ^\circ C$ or $33 \ K$).For most gases,the Joule-Thomson expansion results in a cooling effect because the work done during adiabatic expansion is at the cost of internal energy.However,for gases like $H_2$ and $He$,the temperature of the gas is above their respective inversion temperatures at room temperature,leading to a heating effect upon expansion.

When helium is allowed to expand into vacuum,a heating effect is observed. The reason for this is that

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