Question

a) Plot temperature variation of heat capacity for first order and second order Phase
transitions.
b) What is Joule-Thomson effect? Derive an expression for Joule-Thomson coefficient for
a van der Waals gas in terms of inversion temperature. Discuss its significance for
liquefication of gases.
c) Calculate the ratio (PV / RT) at the critical point for a gas which obeys the equation of
state p (V − b) = RT exp (− a / RTV ).(note in ques c a means alpha)