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C192045 Pages: 2

Establish the inequality of Clausius
Determine the maximum work obtainable from two finite bodies at temperature
11 and 2. What are the causes of entropy increase?
Derive expression for useful work for a steady flow system which interacts only
with the surroundings.
Calculate the decrease in exergy when 25 kg of water at 95°C mix with 35 kg of
water at 35°C, the pressure being taken as constant and the temperature of the
surroundings being 15°C (டி of water = 4.2 kJ/kg 1९)
A vessel of volume 0.04 ന്‌ contains ೩ mixture of saturated water and saturated
steam at a temperature of 250°C. The mass of the liquid present is 9 kg. Find the
pressure, the mass, the specific volume, the enthalpy, the entropy and the internal
energy
PART ^

Answer any four full questions, each carries 10marks.
Define the following:
(1) Avogadro's Law (2) Equations of State
Express the changes in internal energy and enthalpy of an ideal gas in a
reversible adiabatic process in terms of the pressure ratio.
Define Virial Expansion. Also explain Law of corresponding state.
Explain Van der Waals equation of state. How does it differ from the Ideal gas
equation of state?
State and explain Amagat's law of partial volumes of a gas mixture

A mass of 0.25 kg of an ideal gas has a pressure of 300 kPa, a temperature of
80°C, and a volume of 0.07 73. The gas undergoes an irreversible adiabatic
process to a final pressure of 300 kPa and final volume of 0.101, during which
work done on gas is 25 kJ. Evaluate the ‏مہ‎ and ०५ of the gas and the increase in
entropy of the gas.

Derive Maxwell's equation

Define Volume expansivity and isothermal compressibility
Explain Joule - Kelvin effect. What is the significance of inversion curve?
Define adiabatic flame temperature. How is it estimated?

Explain (1) Enthalpy of Combustion (2) Internal Energy of combustion

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