The equation of state of a real gas is given by (P+a/V^2)(V-b)=R T, where P, V and T are pressure, volume and temperature respectively and R is the…

The equation of state of a real gas is given by $\displaystyle \left(P+\frac{a}{V^2}\right)(V-b)=R T$, where $\displaystyle P, V$ and $\displaystyle T$ are pressure, volume and temperature respectively and $\displaystyle R$ is the universal gas constant. The dimensions of $\displaystyle \frac{a}{b^2}$ is similar to that of :