The Stokes-Einstein law by macroscopic arguments

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The Stokes-Einstein law, which expresses the diffusion coefficient in terms of solvent viscosity and solute molecular radius, is based on the assumption that a diffusing ion or molecule moves among solute molecules as a macroscopic entity does in a continuum. Since the small dimension of the diffusing species often renders this assumption untenable, whereas experiments support the validity of the law, a new deduction is proposed, based on elementary macroscopic laws of thermodynamics, hydrodynamics and diffusion. Comparison of the laws by Fick and by Hagen and Poiseuille results in the Stokes-Einstein formula.

Original languageEnglish
Pages (from-to)549-550
Number of pages2
JournalRadiation Physics and Chemistry
Volume37
Issue number3
Publication statusPublished - Jan 1 1991

ASJC Scopus subject areas

  • Radiation

Fingerprint Dive into the research topics of 'The Stokes-Einstein law by macroscopic arguments'. Together they form a unique fingerprint.

  • Cite this