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Mass Transfer

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

K ∝ D
K ∝ √D
K ∝ D1.5
K ∝ D2

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Mass Transfer
Humid volume, at a given temperature is a/an __________ function of humidity.

Inverse
Linear
Exponential
Logarithmic

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Mass Transfer
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

Range is 15°F
Neither A nor B
Both A & B
Approach is 10°F

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Mass Transfer
Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate.

Does not affect
Increases
Decreases
Exponentially increases

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Mass Transfer
__________ developed the film theory.

Higbie
Ergun
Levenspeil
Fick

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Mass Transfer
Steady state equimolal counter diffusion is encountered in

Separation of a binary mixture by distillation
All liquid-liquid diffusion systems
All of these
Absorption of NH₃ from air by water

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