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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Stefan
Fick
Toor and Marchello
Danckwerts

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Mass Transfer
Mass transfer co-efficient is directly proportional to DAB according to the __________ theory.

Penetration
Film
None of these
Surface-renewal

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Mass Transfer
Boiling point diagram is not affected by the ambient

Both B and C
Humidity
Pressure
Temperature

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Mass Transfer
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.

Cannot be predicted as data are insufficient
Is same as
Is greater than
Is lower than

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Mass Transfer
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

0.107
0.017
0.215
0.31

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Mass Transfer
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a

Higher relative humidity
Higher wet bulb temperature
Higher absolute (specific) humidity
Higher dew point

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