First slide

Liquefaction of gas and critical constants

Question

Given van der Waals' constant for ${NH}_{3}, H_{2}, O_{2} and {CO}_{2}$ are respectively 4.17,0.244,1.36 and 3.59, which one of the following gases is most easily liquefied?

Easy

A

${NH}_{3}$
B

$H_{2}$
C

$O_{2}$
D

${CO}_{2}$

Solution

van der Waals' constant 'a' signifies the intermolecular forces of attraction between the particle of gas. So, higher the value of 'a', easier will be the liquefaction of gas.

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