a. Show that the inversion temperature of the Joule–Thomson coefficient cJT, namely, the temperature at which its value changes from positive to negative, for a gas obeying the van der Waals equation...

a. Show that the inversion temperature of the Joule–Thomson coefficient cJT, namely, the temperature at which its value changes from positive to negative, for a gas obeying the van der Waals equation of state given by the expression,

b. Show that this expression is equivalent to that obtained in Example 14.1.