Question

For a non zero value of force of attraction between the gas molecules and zero volume occupied by the gas molecules, give a modified expression for vander waal's equation

Answer 1

Vander waal's equation is $\bf{(P+\frac{an^2}{V^2}).(V+nb)=nRT}$
where a and b are ven-der-waals coefficient
V is volume of gaseous molecule , n is number of mole of gas ,R is universal gas constant , P is pressure and T is temperature in Kelvin

according to question,
a non zero force of attraction occur between the gaseous molecules. eg., a ≠ 0
but volume of gas molecule is zero e.g., b = 0
so, equation will be $\bf{(P+\frac{an^2}{V^2}).(V+n.0)=nRT}$

$\bf{PV+\frac{an^2}{V}=nRT}$