When helium gas is allowed to expand into vac | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The Joule-Thomson effect describes the temperature change of a real gas as it is forced through a valve or porous plug while kept insulated so tha

Vedclass · Accepted Answer

The inversion temperature of helium is very low

Vedclass · Answer

(C) The Joule-Thomson effect describes the temperature change of a real gas as it is forced through a valve or porous plug while kept insulated so that no heat is exchanged with the environment.For most gases, expansion results in cooling because work is done to overcome intermolecular forces.However, for gases like $H_2$ and $He$, the inversion temperature is very low (for $He$, it is approximately $40 \ K$).If the gas temperature is above its inversion temperature during expansion, it exhibits a heating effect instead of cooling.Since the inversion temperature of $He$ is very low, it shows a heating effect under standard conditions.

When helium gas is allowed to expand into vacuum, a heating effect is observed. The reason for this is (assume $He$ as a non-ideal gas):

Similar Questions

For which of the following gases is the value of the van der Waals constant $'a'$ expected to be the highest?

The correct option regarding a container containing $1 \, mol$ of a gas in a $22.4 \, L$ container at $273 \, K$ is:

In the given $pV \to V$ graph for gases at constant temperature,what kind of deviation will be observed for $H_2, He, CO, CH_4$?

The $P$ vs $V$ graph is plotted for $1$ $mole$ of a hypothetical gas. Based on the given isotherms at $200 \ K$ and $300 \ K$,determine the range of $\frac{a}{b}$ for this gas in $atm-L \ mole^{-1}$. [Given: $R = 0.08 \ atm-L \ mole^{-1} \ K^{-1}$]

Under which conditions do real gases deviate most from ideal gas behavior?

Vedclass Test Series

Exam Paper Generator

Online Exam Module