Chemical Engineering Thermodynamics
The equation Tds = dE - PdV applies to

Single phase fluid of constant composition
Single phase fluid of varying composition
Open as well as closed systems
Both B and C

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Chemical Engineering Thermodynamics
The necessary condition for phase equilibrium in a multiphase system of N components is that the

Sum of the chemical potentials of any given component in all the phases should be the same
Chemical potentials of all components should be same in a particular phase
None of these
Chemical potentials of a given component should be equal in all phases

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Chemical Engineering Thermodynamics
The necessary and sufficient condition for equilibrium between two phases is

The chemical potential of each component should be same in the two phases
The concentration of each component should be same in the two phases
The temperature of each phase should be same
The pressure should be same in the two phases

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Chemical Engineering Thermodynamics
Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which

Two liquids are completely separated into two layers
None of these
A homogeneous solution (say of phenol water) is formed
Mutual solubility of the two liquids shows a decreasing trend

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