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Mass Transfer

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

Danckwerts
Kissinevskii
Higbie
Toor and Marchello

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Mass Transfer
Dimension of mass diffusivity is the same as that of

Pressure
Surface tension
Dynamic viscosity
Kinematic viscosity

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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 ∝ D1.5
K ∝ D2

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

Surface-renewal
Penetration
Film
None of these

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Mass Transfer
Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

Electrical resistance
Thermal conductivity
None of the listed here
Strength

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

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