The Van der Waals equation of state for real gas is mentioned below.
\(P = \frac{{RT}}{{v - b}} - \frac{a}{{{v^2}}}\)
Now which of the following statements are true regarding Van der Waals equation?1
Van der Waals equation is explicit in Pressure and Temperature but not specific volume.
2
At critical point, but \({\left( {\frac{{\partial P}}{{\partial v}}} \right)_T} = 0\) but \({\left( {\frac{{{\partial ^2}P}}{{\partial {v^2}}}} \right)_T} \ne 0\)
3
At critical point, the critical volume is equal to 3 times the constant b
4
At critical point, the compressibility factor, Z = 0.375