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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
High __________ is an undesirable property for a good refrigerant.

Specific vapor volume
Specific heat
Latent heat of vaporisation
Viscosity

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Chemical Engineering Thermodynamics
The chemical potential for a pure substance is __________ its partial molal free energy.

More than
Less than
Not related to
Equal to

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Chemical Engineering Thermodynamics
At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

92
72
142
192

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Chemical Engineering Thermodynamics
Which of the following is not a reversible process ?

Solution of NaCl in water at 50°C
Expansion of an ideal gas against constant pressure
Atmospheric pressure vaporisation of water at 100°C
None of these

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Chemical Engineering Thermodynamics
The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is

+ve
-ve
∞

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Chemical Engineering Thermodynamics
In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in

Increased or decreased COP ; depending upon the type of refrigerant
No change in the value of COP
Enhanced COP
Decreased COP

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