Question

Write the significance of Vanderwaal's constants.

Answer 1

In the van der Waals equation, constant a' is a measure for the attraction between the particles and constant b' is the average volume excluded from v by a particle.

Answer 2

Explanation:

The conditions for real gas are :

Real gas are those gas that have intermolecular attractions.

Real gas are those gas that have volume.

The equation is  van der waals equation  will be,

$(P+\frac{an^2}{V^2})(V-nb)=nRT$

where,

P = pressure of gas

V = volume of gas

n = number of moles of gas

R = gas constant

T = temperature of gas

Physical significance of ‘a’ : It measures the magnitude of intermolecular attractive forces between the particles.

Physical significance of ‘b’:  It measures the volume excluded by a mole of particles.