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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Danckwerts
Stefan
Toor and Marchello
Fick

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Mass Transfer
In case of unsaturated air

Dew point < wet bulb temperature
None of the listed here
Both of the options given here
Wet bulb temperature < dry bulb temperature

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Mass Transfer
Percentage saturation is __________ the relative saturation.

Always smaller than
None of these
Always greater than
Not related to

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Mass Transfer
The dew point of a saturated gas phase equals the __________ temperature.

Room
Gas
Wet bulb
None of these

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Mass Transfer
1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is

0.4
0.175
0.25
0.2

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Mass Transfer
Flash distillation is suitable for separating the constituents of a binary system, which

Form constant boiling azeotrope
Have very close boiling points
Have very wide boiling points
Form minimum boiling azeotrope

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