Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The van der Waals equation for one mole of a real gas can be written as
(P + a/V 2 ) (V – b) = RT. For the gases H 2 , NH 3 , and CH 4 , the value of 'a' (bar L –2 mol –2 ) are
0.2453, 4.170 and 2.253 respectively.
Which of the following can be inferred from the 'a' values ?
Text Solution
Verified by ExpertsThe correct answer is:
A
van der Wall's constant 'a' gives information about force of attraction between gaseous molecules.. Higher the value of 'a' higher will be force of attraction, and easier the liquefaction of gas.Order of intermolecular force of attraction = H 2 < CH 4 < NH 3 .
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