The temperature below which a gas cannot exis | vedclass

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Question

(B) The $Critical \ temperature$ $(T_c)$ of a gas is defined as the temperature above which a gas cannot be liquefied,no matter how much pressure is a

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Critical temperature

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(B) The $Critical \ temperature$ $(T_c)$ of a gas is defined as the temperature above which a gas cannot be liquefied,no matter how much pressure is applied. Conversely,it is the temperature below which a gas can be liquefied by the application of pressure alone. Therefore,the temperature below which a gas cannot exist in the gaseous state (as it would condense) is related to the $Critical \ temperature$.

Gas	$a$ (atm $L^2$ mol$^{-2}$)	$b$ ($L$ mol$^{-1}$)
$W$	$4.0$	$0.027$
$X$	$8.0$	$0.030$
$Y$	$6.0$	$0.032$
$Z$	$12.0$	$0.027$

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

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Critical temperature for carbon dioxide and methane are $31.1^{\circ} C$ and $-81.9^{\circ} C$ respectively. Which of these has stronger intermolecular forces and why?

For gases $W, X, Y$ and $Z$,the van der Waals constants are given below. Which gas has the highest critical temperature?
Gas $a$ (atm $L^2$ mol$^{-2}$) $b$ ($L$ mol$^{-1}$)
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$X$ $8.0$ $0.030$
$Y$ $6.0$ $0.032$
$Z$ $12.0$ $0.027$

What is the temperature below which a gas cannot exist as a gas (i.e.,it liquefies) called?

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