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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
Standard temperature and pressure (S.T.P.) is

15°C and 750 mm Hg
15°C and 1 kgf/cm²
0°C and 750 mm Hg
0°C and 1 kgf/cm²

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Chemical Engineering Thermodynamics
A gas can be liquified by pressure alone only, when its temperature is __________ its critical temperature.

Less than or equal to
More than
Equal to or higher than
Less than

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Chemical Engineering Thermodynamics
Partial molar free energy of an element A in solution is same as its

Fugacity
Chemical potential
Activity
Activity co-efficient

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Chemical Engineering Thermodynamics
A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system

U and S both decreases
U is constant but S decreases
U decreases but S is constant
Its internal energy (U) decreases and its entropy (S) increases

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Chemical Engineering Thermodynamics
In an irreversible process

DE - dW - Tds = 0
Tds - dT + dW< 0
Tds = dE - dW = 0
Tds - dE + dW< 0

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Chemical Engineering Thermodynamics
Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is

3
2
1

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