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Mass Transfer

Mass Transfer
Penetration model (theory) for mass transfer was enunciated by

Danckwerts
Toor and Marchello
Kissinevskii
Higbie

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Mass Transfer
Free flowing granular materials can be best dried in a __________ drier.

Freeze
Rotary
Cylinder
Drun

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Mass Transfer
The binary diffusivity in gases at atmospheric conditions is about

10-1 cm²/sec
10-4 cm²/seC₂
10-3 sec/cm
10-9 cm/sec

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Mass Transfer
At a fixed total pressure, humidity depends only on the

Partial pressure of vapour in the mixture
Heat capacity of the vapour
None of these
Density of the vapour

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Mass Transfer
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

q > 1
q < 1
q = 1
q = 0

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Mass Transfer
The vapour pressure exerted by the moisture contained in a wet solid depends upon the

Nature of the solid
All of these
Nature of the moisture
Temperature

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