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单词 Nernst–Einstein equation
释义
Nernst–Einstein equation

Chemistry
  • An equation relating the limiting molar conductivity Λ‎m0 (see Kohlrausch’s law) to the ionic diffusion coefficients, devised by Walter Nernst and Albert Einstein. The Nernst–Einstein equation is

    Λm0=(F2/RT)(v+z+2D++vz2D),

    where F is the Faraday constant, R is the gas constant, T is the thermodynamic temperature, v+ and v are the number of cations and anions per formula unit of electrolyte, z+ and z are the valences of the ions, and D+ and D are the diffusion coefficients of the ions. An application of the Nernst–Einstein equation is to calculate the ionic diffusion coefficients from experimental determinations of conductivity.


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