# Answer to Question #39782 in Molecular Physics | Thermodynamics for vinay kumar

Question #39782

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)

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)

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