Question

Van der Waals constant $b$ in a corrected equation for real gases represents:

• A. measure of effective size of gas molecules
• B. magnitude of attractive forces among gas molecules
• C. free volume of the molecules
• D. difference in pressure and volume of gas molecules

Answer 1

The correct option is A measure of effective size of gas molecules

Van der waals constant $b$ in corrected equation for real gases represents measure of effective size of gas molecules.

$(P+\frac{a}{V^2}(V-b)=RT$

$⟹b$ has same units as that of volume.