Diffusion and Fick's law, mass transfer coefficients, vapor-liquid equilibrium basics, and how mass transfer underlies every separation process covered later in this program.
Mass transfer is the physical mechanism behind every separation process in this program — distillation, absorption, stripping, and extraction all work by moving a component from one phase into another. This module builds diffusion and Fick's law as the direct mass-transfer analog of Module 3's conduction, the mass transfer coefficient as the convective analog of a convective heat transfer coefficient, and two-film theory as the mass-transfer parallel to combining resistances in series for an overall heat transfer coefficient.
By the end of this module you should be able to explain why phase equilibrium sets the theoretical limit no real separation equipment can exceed, and how vapor-liquid equilibrium (VLE) and Raoult's law determine how far a single distillation or absorption stage can actually separate a mixture — the exact foundation Module 7's separation processes and Module 8's distillation content build on.