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Mass Transfer

Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

3.97
0.24
600
1

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Mass Transfer
In a binary system, separation is very efficient, when the relative volatility is

0.5
< 1
> 1
1

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Mass Transfer
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

0.56
2
1
1.56

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Mass Transfer
What is the degree of freedom of an absorption process in which only one component is transferred between phases?

1
3
4
2

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Mass Transfer
Molecular seives are regenerated by heating to __________ °C.

< 150
> 500
> 1000
200-330

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Mass Transfer
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)

G/mL
LG/m
L/mG
ML/G

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