Mass Transfer

Calculation of mass transfer co-efficient is mostly/normally done using ______________ theory?

Byadmin February 14, 2019August 22, 2021

Calculation of mass transfer co-efficient is mostly/normally done using ______________ theory?

A. Surface renewal
B. Film
C. Penetration
D. None of these

Mass Transfer

When an unsaturated air-water mixture is heated at constant pressure, then ____________________ ?

When an unsaturated air-water mixture is heated at constant pressure, then ____________________ ?

A. The partial pressure of water vapour increases
B. The specific humidity decreases
C. The relative humidity increases
D. The relative humidity decreases

Read More When an unsaturated air-water mixture is heated at constant pressure, then ____________________ ?
CHEMICAL ENGINEERING | Mass Transfer

In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.

Question: In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.
[A].

total
[B].
minimum
[C].
operating
[D].
maximum permissible

Answer: Option A

Explanation:

No answer description available for this question.

Read More In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.
CHEMICAL ENGINEERING | Mass Transfer

At equilibrium the concentration of water in vapour phase (C*)in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is

Question: At equilibrium the concentration of water in vapour phase (C*)in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is
[A].

0.0
[B].
0.2
[C].
0.4
[D].
1.0

Answer: Option C

Explanation:

No answer description available for this question.

Read More At equilibrium the concentration of water in vapour phase (C*)in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is
Mass Transfer

Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the ________________ number?

Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the ________________ number?

A. Sherwood
B. Schmidt
C. Peclet
D. Stanton

Read More Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the ________________ number?
Mass Transfer

According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B ? Assume that relative volatility (αAB = 2) does not change appreciably in the column ?

According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B ? Assume that relative volatility (αAB = 2) does not change appreciably in the column ?

A. 5
B. 9
C. 12
D. 28

Read More According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B ? Assume that relative volatility (αAB = 2) does not change appreciably in the column ?
Mass Transfer

In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is_________________?

In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is_________________?

A. Equal to the heat of formation of surface compound
B. Equal to the heat of wetting
C. Zero
D. Called integral heat of adsorption

Read More In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is_________________?

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