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Mass Transfer

Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

99
90
95
91.5

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Mass Transfer
Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as

K ∝ D1.5
K ∝ √D
K ∝ D
K ∝ D2

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Mass Transfer
Fractional solvent extraction

Employs only one solvent
None of the listed here
Results in low interfacial tension
Employs two solvents

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Mass Transfer
Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

K ∝ D
K ∝ √D
K ∝ D2
K ∝ D1.5

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Mass Transfer
At minimum reflux ratio for a given separation

Number of plates is infinity
Separation is most efficient
Number of plates is zero
Minimum number of the theoretical plates is required

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Mass Transfer
If f is defined as above, then which of the following applies to a feed at dew point?

F < 1
0 < f < 1
F = 1
F > 1

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