Which gas, He or H₂O vapor, has the lower value of a in the van der Waals equation?

Name: Which gas, He or H 2 O vapor, has the lower value of a in the van der Waals equation?
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Question

Quizplus · Accepted Answer

The value of a in the van der Waals equation is proportional to the attractive forces between the particles in the gas. He is a noble gas with very weak van der Waals forces, while H₂O is a polar molecule with stronger van der Waals forces due to dipole-dipole interactions. Therefore, He has a lower value of a than H₂O.

Which Gas, He or H2O Vapor, Has the Lower Value

Which Gas, He or H₂O Vapor, Has the Lower Value