Question

Two real gases X and Y have van Der Waal's constant 'a' values as 15.2 and
2.7 atm · 12 /mol. Which of these can be more easily liquified?​

Answer 1

Wandervaal constant a signifies about the force of attraction between the molecules in a gas.

Higher the value of a more will be the force of attraction between it's molecules and more difficult would be it's liquification.

So in given condition gas Y has less value of a so intermolecular attraction between it's molecules is less so it will be easily liquified in comparison to gas X.

Hope you understand it!!!!!!