Question

In van der Waals equation of state for a non-ideal gas, the term that accounts for inter molecular forces is

• A. ( V- b)
• B. $(RT)^{-1}$
• C. $\Bigg(p+\frac{a}{V^2}\Bigg)$
• D. RT

Answer 1

Answer: (C)

$\Bigg(p+\frac{a}{V^2}\Bigg)$

Answer 2

The van der Waals' equation is
$\Bigg(p+\frac{a}{V^2}\Bigg)(V-b)=RT$
the term $\Bigg(p+\frac{a}{V^2}\Bigg)$is used for pressure correction it measures the intermolecular forces between the molecules of gas.