Revisiting Discrepancies in Diffusion Theory: Molecular Motion in Liquids | HackerNoon
Briefly

Hildebrand's critique suggests that traditional methods for calculating diffusivity from kinetic theory fail to account for the unique behavior of solute molecules in liquids, leading to misconceptions.
The randomness of molecular motion in liquids cannot be accurately modeled using simple vector forces, as it misses the intrinsic complexity of soft collisions and energy exchanges among molecules.
Molecular diffusion requires a reevaluation beyond classical approaches; the behavior of polyatomic molecules is too nuanced for simple models derived from ideal gases.
A more sophisticated mathematical framework is needed to understand molecular dynamics as traditional methods are inadequate for capturing the subtleties of inter-molecular interactions.
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