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2 D 11820
What is Joule Thompson effect ?

Show that heat capacity at constant volume of a system is the rate of change of internal energy
with temperature at constant volume.

He and H show heating effect on adiabatic expansion. Why ?

Calculate the work done during isothermal expansion of one mole of an ideal gas from 10 atmosphere
to 1 atmosphere at 300K.

Calculate the amount of heat liberated in the neutralization of 0.75 mole of nitric acid with
0.75 mole of NaOH.

Show that Parachor of a liquid is the volume of that liquid at a temperature at which its surface
tension is unity.

What is the effect of temperature on surface tension ?

The parachor values of ethane and propane are 110.5 and 150.8 respectively. What values of

parachor do you expect for hexane ?
The manufacture of ammonia is usually done at elevated pressure conditions. Why ?
(10 x 2 = 20 marks)
Section C

Answer any five questions.

Each question carries 6 marks.
Explain the PV isotherms of CO, with a discussion on the continuity of state.

Show that decrease of both Work function and Gibbs free energy of a system with respect to
temperature give rise the entropy of the system.

(a) State Carnot theorem ; and (b) Calculate the maximum efficiency of a steam engine operating
between 110°C and 25°C,

Discuss the mathematical formulation of Gibbs Helmholtz equation.

Formulate the integrated from of Clausius Clapeyron equation. Discuss its applications.
Discuss the Nemst heat theorem and state third law of thermodynamics.

Illustrate the use of Ostwald’s viscometer for determination of viscosity of a liquid.

Explain the effect of temperature and pressure on the reactions of formation of SO, and
decomposition of PCl;.

(5 x 6 = 30 marks)

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