Mass Transfer
The McCabe Δ L law states that the

Linear crystal growth rate does not depend on the crystal size
Linear crystal growth rate depends on the degree of supersaturation
Linear crystal growth rate depends on the crystal size
Molar heats of vaporisation of components are nearly equal

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Mass Transfer
Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m² and the solvent flow, rate is 400 moles of S/m². hr. The equilibrium data is represented by Y = 3X² , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is

0.5
0.25
0.7
0.9

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