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2 C 20658

Section B (Paragraph/Problem Type)

Answer at least five questions.

Each question carries 5 marks.

All questions can be attended.
Overall Ceiling 25.

Explain the isotherms of H,O.

Write down the equations representing the hydrostatic properties of a pure substance and then

express Maxwell’s thermodynamic relations.
Find the change in entropy when a perfect gas expands isothermally and adiabatically.

The pressure of 10 g of copper is increased at ice point from 0 to 1000 times the atmospheric
pressure. Calculate the work done. Given the density of copper 8930 kgm~%, its isothermal
compressibility 7.16 x 10-12Pa-t,

What are virial coefficients ? Give their significance.

Show that the adiabatic curve has a steeper negative slope than does an isothermal curve at the

same point.
Explain the microscopic theories which help to give information about thermal properties of
systems.
(5 x 5 = 25 marks)
Section C (Essay Type)
Answer any one question.
The question carries 11 marks.

Analyse the working of a Carnot’s engine, calculating expression for its efficiency.

Discuss first order phase transition and derive the Clausius-Clapeyron equation.

(1 x 11 = 11 marks)

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