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Mass Transfer

Mass Transfer
Rate of leaching increases with increasing

Temperature
Viscosity of solvent
Size of the solid
Pressure

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Mass Transfer
Absorption factor is defined as (where, S₁ = slope of the operating line S₂ = slope of the equilibrium curve)

S₁/S₂
S₂/S₁
S₁ - S₂
S₁ x S₂

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Mass Transfer
Absorption accompanied with chemical reaction is exemplified by the absorption of

All of these
Benzol present in coke oven gas by wash oil
Ammonia in water
SO₂ in alkaline solution

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Mass Transfer
Steady state equimolal counter diffusion occurs in case of

Leaching
Liquid-liquid extraction
Absorption
Binary phase distillation

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Mass Transfer
Mass transfer co-efficient is defined as

Co-efficient = Flux/concentration difference
Flux = Co-efficient/concentration difference
Flux=concentration difference/co-effi-cient
None of the listed here

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Mass Transfer
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

Both A & B
Neither A nor B
Range is 15°F
Approach is 10°F

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