(A) The critical temperature $(T_c)$ of a gas is a measure of the strength of intermolecular forces of attraction. Higher $T_c$ indicates stronger int

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Carbon dioxide is easier to liquefy than methane.

(A) The critical temperature $(T_c)$ of a gas is a measure of the strength of intermolecular forces of attraction. Higher $T_c$ indicates stronger intermolecular forces,making the gas easier to liquefy.For $CO_2$,$T_c = 31.1 \, ^\circ C$,and for $CH_4$,$T_c = -81.9 \, ^\circ C$.Since $31.1 \, ^\circ C > -81.9 \, ^\circ C$,the intermolecular forces in $CO_2$ are stronger than in $CH_4$.Therefore,$CO_2$ can be liquefied more easily than $CH_4$ at a given temperature.

Class 11 Chemistry States of Matter Critical state and Liquefaction of gases

Medium

The critical temperatures for carbon dioxide $(CO_2)$ and methane $(CH_4)$ are $31.1 \, ^\circ C$ and $-81.9 \, ^\circ C$ respectively. Which of the following statements is correct regarding their liquefaction?

A
Carbon dioxide is easier to liquefy than methane.
B
Methane is easier to liquefy than carbon dioxide.
C
Both gases have the same ease of liquefaction.
D
Neither gas can be liquefied.

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States of Matter

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Critical state and Liquefaction of gases

Assertion : Gases do not liquefy above their critical temperature,even on applying high pressure.
Reason : Above critical temperature,the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

MediumAIIMS 2016

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The temperature below which a gas cannot exist is called ...............

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The compressibility factor $(Z)$ of a gas at critical state is $(T_c = \frac{8 a}{27 R b}; p_c = \frac{a}{27 b^2}; V_c = 3 b)$.

MediumTS EAMCET 2019

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Isotherms of carbon dioxide gas are shown in the figure. Mark a path for changing gas into liquid such that only one phase (i.e.,either a gas or a liquid) exists at any time during the change. Explain how the temperature,volume,and pressure should be changed to carry out this process.

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Which of the following statements is incorrect?

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The critical temperatures for carbon dioxide $(CO_2)$ and methane $(CH_4)$ are $31.1 \, ^\circ C$ and $-81.9 \, ^\circ C$ respectively. Which of the following statements is correct regarding their liquefaction?

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Assertion : Gases do not liquefy above their critical temperature,even on applying high pressure.Reason : Above critical temperature,the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

The temperature below which a gas cannot exist is called ...............

The compressibility factor $(Z)$ of a gas at critical state is $(T_c = \frac{8 a}{27 R b}; p_c = \frac{a}{27 b^2}; V_c = 3 b)$.

Isotherms of carbon dioxide gas are shown in the figure. Mark a path for changing gas into liquid such that only one phase (i.e.,either a gas or a liquid) exists at any time during the change. Explain how the temperature,volume,and pressure should be changed to carry out this process.

Which of the following statements is incorrect?

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Assertion : Gases do not liquefy above their critical temperature,even on applying high pressure.
Reason : Above critical temperature,the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.