Mass Transfer
The rate of solid-liquid extraction is limited by the

All of these
Diffusion of the solute through the solvent in the pores to the outside of the particle
Phase change of the solute as it dissolves in the solvent
Diffusion of the solute from the solution in contact with the particle to the main bulk of the solution

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Mass Transfer
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect

The product composition as well as the fraction vaporised
Neither the product composition nor the fraction vaporised
The fraction vaporised but not the product composition
The product composition but not the fraction vaporised

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