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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
Gibbs free energy at constant pressure and temperature under equilibrium conditions is

Minimum
Maximum
∞

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Chemical Engineering Thermodynamics
The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is

(∂V/∂S)P = (∂T/∂P)S
(∂S/∂P)T = -(∂V/∂T)P
(∂S/∂V)T = (∂P/∂T)V
(∂T/∂V)S = -(∂P/∂S)V

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Chemical Engineering Thermodynamics
Van Laar equation deals with the activity co-efficients in

Azeotropic mixture only
Binary solutions
None of these
Ternary solutions

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Chemical Engineering Thermodynamics
The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature.

Inversion
Reduced
Boyle
Critical

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Chemical Engineering Thermodynamics
In a turbine, the fluid expands almost

Isobarically
Adiabatically
Isothermally
None of these

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Chemical Engineering Thermodynamics
At the critical point of a substance

The surface tension vanishes
There is no distinction between liquid and vapour phases
Liquid and vapour have the same density
All of these

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