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Self-diffusion
Sign in to saveSelf-diffusion describes the diffusive motions of molecules within themselves e.g. the movement of a water molecule in water. According to the IUPAC definition, the self-diffusion coefficient D_i^* of medium i is the diffusion coefficient D_i of a chemical species in said medium when the concentration of this species is extrapolated to zero concentration. It can be described by the equation:
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It is catalogued under the topic Diffusion.
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Self-diffusion describes the diffusive motions of molecules within themselves e.g. the movement of a water molecule in water. According to the IUPAC definition, the self-diffusion coefficient D_i^* of medium i is the diffusion coefficient D_i of a chemical species in said medium when the concentration of this species is extrapolated to zero concentration. It can be described by the equation:
D_i^* = D_i\frac{\partial\ln c_i}{\partial\ln a_i}
Excerpted from Wikipedia’s “Self-diffusion” article, available under the CC BY-SA 4.0 licence.