Answer to Question #100812 in Molecular Physics | Thermodynamics for Nilesh Sankhla

Question

3. a) Calculate an expression for entropy of mixing of two ideal gases having n1 and n2
moles respectively at constant temperature T and pressure p. Does it hold for liquids
also? Justify. (5)
b) State Kelvin-Planck and Clausius statements of the second law of thermodynamics.
Establish the equivalence of these two statements. (5)
c) Derive the Ehrenfest’s equation for a second order phase transition. How second
order phase transition is different from lambda transition? Plot Cp versus T for
second order and lambda transitions.

Answer 1

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