Explainthe physical significance of Van der Waals parameters.

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Solution

Physicalsignificance of ‘a’:
‘a’is a measure of the magnitude of intermolecular attractive forceswithin a gas.
Physicalsignificance of ‘b’:
‘b’is a measure of the volume of a gas molecule.

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Explain the physical significance of Van der Waals parameters.

Q. What is the physical significance of Vander Waals parameter.

The van der Waals' parameters for gases W,X,Y and Z are

$\begin{matrix} G a s & a (l i t r e^{2} - a t o m / m o l^{2}) & b (l i t r e / m o l) W & 4.0 & 0.027 X & 8.0 & 0.030 Y & 6.0 & 0.032 Z & 12.0 & 0.027 \end{matrix}$

Which one of these gases has the highest critical temperature?

The value of critical temperature $T_{C}$ for a gas is :

Q. Assertion :In physical adsorption, enthalpy of adsorption is very low. Reason: In physical adsorption, attraction between gas molecules and solid surface is due to weak van der Waals forces.

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Explainthe physical significance of Van der Waals parameters.

Physicalsignificance of ‘a’:‘a’is a measure of the magnitude of intermolecular attractive forceswithin a gas.Physicalsignificance of ‘b’:‘b’is a measure of the volume of a gas molecule.

Physicalsignificance of ‘a’:
‘a’is a measure of the magnitude of intermolecular attractive forceswithin a gas.
Physicalsignificance of ‘b’:
‘b’is a measure of the volume of a gas molecule.