The equation of state of pure water determined from sound speeds

Chen Tung Chen, Rana A. Fine, Frank J. Millero

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151 Scopus citations


The equation of state of water valid over the range 0-100°C and 0-1000 bar has been determined from the high pressure sound velocities of Wilson, which were reanalyzed by Chen and Millero. The equation of state has a maximum error of ±0.01 bar-1 in isothermal compressibility and is in the form of a secant bulk modulus: K = V0P/(V0-V)=K 0+AP+BP2, where K, K0, and V, V0 are the secant bulk moduli and specific volumes at applied pressures P and 0 (1 atm), respectively; A and B are temperature dependent parameters. The good agreement (to within 20X10-6 cm3g-1) of specific volumes calculated using the above equation with those obtained from other modifications of the Wilson sound velocity data demonstrates the reliability of the sound velocity method for de lining equations of state.

Original languageEnglish (US)
Pages (from-to)2142-2144
Number of pages3
JournalThe Journal of Chemical Physics
Issue number5
StatePublished - 1976

ASJC Scopus subject areas

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


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