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Liquefaction of Gases and Critical Constants

The value of ...

Question

The value of van der Waals' constant $a$ for various gases are given
$\begin{matrix} Gas & a (L^{2} a t m m o l^{- 2}) N_{2} & 1.390 O_{2} & 1.360 N H_{3} & 4.170 C H_{4} & 2.253 \end{matrix}$
The order of liquefaction of these gases is

A

N_{2} > O_{2} < N H_{3} > C H_{4}

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B

N H_{3} < C H_{4} < N_{2} > O_{2}

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C

N H_{3} > C H_{4} > N_{2} > O_{2}

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D

N_{2} < O_{2} < N H_{3} < C H_{4}

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Solution

The correct option is C $N H_{3} > C H_{4} > N_{2} > O_{2}$
Higher the value of van der Waals' constant $^{'} a^{'}$ , higher the force of attraction between the molecules, therefore, liquefaction will be easier. $N H_{3}$ has highest value of 'a' due to H-bonding leading to strong intermolecular forces.
Hence, the order of liquefaction of the gases is $N H_{3} > C H_{4} > N_{2} > O_{2}$ .

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Similar questions

Q. For three different gases values of Van der Waals' constant

^{'} a^{'}

^{'} b^{'}

are given. What is the correct order of liquefaction of gases?

Gases	$a$	$b$
$X_{2}$	$1.3$	$0.090$
$Y_{2}$	$4.1$	$0.023$
$Z_{2}$	$2.2$	$0.075$

Q. The value of van der Waals' constant

a

for various gases are given

\begin{matrix} Gas & a (L^{2} a t m m o l^{- 2}) N_{2} & 1.390 O_{2} & 1.360 N H_{3} & 4.170 C H_{4} & 2.253 \end{matrix}

The order of liquefaction of these gases is

Q. For three different gases, values of van der Waals' constant

^{'} a^{'}

^{'} b^{'}

are given. What is the correct order of liquefaction of gases?

Gas	$^{'} a^{'}$	$^{'} b^{'}$
$X_{2}$	1.3	0.090
$Y_{2}$	4.1	0.023
$Z_{2}$	2.2	0.075

Q. The values of Van der Waals constant 'a' for the gases

O_{2}

N_{2}

N H_{3}

C H_{4}

are 1.360, 1.390, 4.170 and 2.253 L atm mol

^{- 2}

respectively. The gas which can most easily be liquefied is:

Q. van der Waals' constants of two gases

X

Y

\begin{matrix} a (L^{2} a t m {mol}^{- 2}) & b ({L mol}^{- 1}) Gas X & 5.6 & 0.065 Gas Y & 5.1 & 0.012 \end{matrix}

Which option is true?

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Liquefaction of Gases and Critical Constants

Standard XI Chemistry

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