Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

9

10

1

8

9

10

1

8

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Decreases

Remains unaffected

Decreases linearly

Increases

Decreases

Remains unaffected

Decreases linearly

Increases

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Mass Transfer
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its

Integral heat of adsorption

Heat of normal condensation

Heat of wetting

Differential heat of adsorption

Integral heat of adsorption

Heat of normal condensation

Heat of wetting

Differential heat of adsorption

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Mass Transfer
Pick out the system with maximum boiling azeotrope at 1 atm.

Acetone chloroform

None of these

Benzene-ethyl alcohol

Ethyl alcohol-water

Acetone chloroform

None of these

Benzene-ethyl alcohol

Ethyl alcohol-water

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Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Lewis number is close to unity

They are always equal under all circumstances

Solubility of the components of air in water is very small

Water has a high latent heat of evaporation

Lewis number is close to unity

They are always equal under all circumstances

Solubility of the components of air in water is very small

Water has a high latent heat of evaporation

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Mass Transfer
The Hatta number is important in

Gas absorption without chemical reaction

Gas absorption with chemical reaction

Multicomponent distillation

Binary distillation

Gas absorption without chemical reaction

Gas absorption with chemical reaction

Multicomponent distillation

Binary distillation

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Mass Transfer

Mass Transfer With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Mass Transfer The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its

Mass Transfer Pick out the system with maximum boiling azeotrope at 1 atm.

Mass Transfer For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Mass Transfer The Hatta number is important in

Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Mass Transfer
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its

Mass Transfer
Pick out the system with maximum boiling azeotrope at 1 atm.

Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Mass Transfer
The Hatta number is important in