Spin-echo diffusion coefficients of water to 2380 bar and -20°C

C. A. Angell, E. D. Finch, L. A. Woolf, P. Bach

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Abstract

The self-diffusion coefficient of water has been measured by the steady-gradient spin-echo method at pressures up to 2380 bar and temperatures between 2 and -20°C in the stable liquid range using both strengthened glass and beryllium-copper pressure vessels. At low temperatures and high pressures the diffusion coefficient becomes almost independent of pressure. However, a rapid increase in DH2O with the first kilobar of applied pressure is inferred for the supercooled liquid from the relation of the new data to the 1 atm pressure diffusivity of supercooled water. The observations may be correlated with the high pressure low temperature thermodynamic properties of water in a manner consistent with the Adam-Gibbs entropy theory of liquid transport processes.

Original languageEnglish (US)
Pages (from-to)3063-3066
Number of pages4
JournalThe Journal of chemical physics
Volume65
Issue number8
DOIs
StatePublished - Jan 1 1976

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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