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02000ME205092001

from the cycle to the atmosphere at a temperature of 25°C, calculate the power
required to drive the plant.
Explain the causes of irreversibly.

“Second law is also known as the law of degradation of energy’, Justify.

A volume vessel of volume 0.04 മ്‌ contains a 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.
Show that the efficiency of the reversible heat engine operating between two
given constant temperature is the maximum.
Draw the phase diagram for a pure substance on h-s plot with relevant constant
property line.

PART C

Answer any four full questions, each carries 10 marks

Express the changes in internal energy and enthalpy of an ideal gas in a
reversible adiabatic process in terms of pressure ratio.
How does the Vander Waal’s equation differ from the ideal gas equation of
states?
Define law of corresponding state. What is compressibility factor?

State Dalton’s law of partial pressures. How is the partial pressure in a gas
mixture related to the mole fraction?
Write Berthelot, Dieterici and Redlich-K wong equation of real gas.

State and explain Amagat’s law of partial volume of gas mixture.

Write down the first and second TdS equations, and derive the expression for
the difference in heat capacities C, and ಛೈ, What does the expression signify?
Define Joule - Thompson co-efficient. Why is it zero for an Ideal gas?

State Helmholtz function and Gibbs function.
Write short notes on enthalpy of formation and enthalpy of combustion.

Define Isothermal compressibility and coefficient of volume expansion.

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