Question

.The vanderwaals constant............ Measure the force of attraction

between molecules of a gas.​

Answer 1

11th/Chemistry

States of Matter

Answer :

The van der waals constant a measure the force of attraction.

★ Real gases : The gases which obey the gas laws only at low pressure and high temperature are called real gases$.$

Equation of state for real gases :

$\boxed{\bf{\purple{{\huge(}P+\dfrac{an^2}{V^2}{\huge)}(V-nb)}=\pink{nRT}}}$

where, a and b are van der waals constants and their values depend on the characteristics of a gas.

⧪ Van der waals constant a :

Significance - Measure of magnitude of attractive forces.

Unit - atm L² mol‾²

⧪ Van der waals constant b :

Significance - Measures of effective size of the gas molecules.

Unit - L mol‾¹

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