Answer to Question #94258 in Physical Chemistry for Abhishek

Question

Derive van der waals eqiation from the ideal gas equation.

Answer 1

Ideal gas equation PV=RT (n=1mol)

For real gass

1) We put the volume available to the molecules (V_m-b), where V_m is the molar volume , b is the volume that the molecules occupy.$P(V_m-b)=RT$

2) We introduce a correction that takes into account the interaction between the molecules.$P=p+\frac{a}{V_m^2}$

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

https://en.m.wikipedia.org/wiki/Van_der_Waals_equation