For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

Mass Transfer
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

L/(FG.G)

(G.a)/FG

FG/(G.a)

F/(FG.a)

L/(FG.G)

(G.a)/FG

FG/(G.a)

F/(FG.a)

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

K ∝ D2

K ∝ D1.5

K ∝ √D

K ∝ D

K ∝ D2

K ∝ D1.5

K ∝ √D

K ∝ D

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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

0.31

0.215

0.017

0.107

0.31

0.215

0.017

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Mass Transfer
Batch tray dryers suffers from the disadvantage of

Non-uniform & low production rate

All of the listed here

High labour cost & low heat economy

High maintenance cost

Non-uniform & low production rate

All of the listed here

High labour cost & low heat economy

High maintenance cost

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Mass Transfer
A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture?

The composition of the mixture in mole percent is: o-xylene 30, p-xylene 60 and m-xyoene 10

The composition of the mixture, in percent by volume is: o-xylene 30, p-xylene 60. and m-xylene 10

The mixture exhibits an azeotrope at 101.3 kPa

The mixture contain optical isomers

The composition of the mixture in mole percent is: o-xylene 30, p-xylene 60 and m-xyoene 10

The composition of the mixture, in percent by volume is: o-xylene 30, p-xylene 60. and m-xylene 10

The mixture exhibits an azeotrope at 101.3 kPa

The mixture contain optical isomers

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Mass Transfer
Which of the following remains constant during sensible cooling process ?

Partial pressure of vapour

None of the listed here

Specific humidity

Specific humidity & Partial pressure of vapour

Partial pressure of vapour

None of the listed here

Specific humidity

Specific humidity & Partial pressure of vapour

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Mass Transfer

Mass Transfer For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

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

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

Mass Transfer Batch tray dryers suffers from the disadvantage of

Mass Transfer A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture?

Mass Transfer Which of the following remains constant during sensible cooling process ?

Mass Transfer
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

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

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

Mass Transfer
Batch tray dryers suffers from the disadvantage of

Mass Transfer
A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture?

Mass Transfer
Which of the following remains constant during sensible cooling process ?