Question

At high temperature and low pressure, van der Waals’ equation can be expressed as:

• A. $[P+\frac{a}{v^2}](v-b)=RT$
• B. $[P+\frac{a}{v^2}]V=RT$
• C. $P(V-b)=RT$
• D. $PV=RT$

Answer 1

The correct option is D $PV=RT$

At low pressure and high temperature, van der Waal's equation is modified as:

$PV=RT$

At low pressure and high temperature, the terms $\frac{a}{V^2}$​ and $b$ becomes very small as compared to $P$ and $V$.