About

    Here we integrate three most accurate equations of state for the calculation of various thermodynamic properties (density, volume, compressibility factor, bulk modulus, enthalpy, entropy, heat capacity, fugacity coefficient, dielectric constant, viscocity) of fluid water, covering a temperature range from 273.15K to 2573K and a pressure range 0 to 10GPa. Any suggestions please contact: duanzhenhao@yahoo.com.

TP Coverage
Note
  • The phase boudaries are calcualted according to Ref. 1 and Ref. 4.
  • The whole fluid region from 273.16 K to 2573.15 K has been divided into three sub regions (with borders indicated with dashed line) to enhance the accuracies as much as possible:
    I (273.16-673.15 K, 0-1 kbar), Ref. 1;
    II (273.16-673.15 K, 1-100 kbar), Ref. 2;
    III (673.15-2573.15 K, 0-100 kbar), Ref3.

References

1. Wagner W, et al. (2000) The IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam. ASME J. Eng. Gas Turbines and Power, 122: 150-182.

2. Zhang ZG, Duan ZH. (2005) Prediction of the PVT properties of water over wide range of temperatures and pressures from molecular dynamics simulation. Phys. Earth Planetary Interiors, 149 (3-4): 335-354.

3. Duan ZH, Zhang ZG. (2006) Equation of state of the H2O-CO2 system up to 10 GPa and 2573K: Molecular dynamics simulations with ab initio potential surface. Geochim. Cosmochim. Acta., 70 (9): 2311-2324.

4. Wagner W, Saul A, Pruss, A. (1994) International equations for the pressure along the melting curve and the sublimation curve of ordinary water substance. J. Phys. Chem. Ref. Data, 23: 515-527.

Basic Properties

Name Formula Molecular weight Tc K Pc bar Dc g/ml
water H2O 18.015 647.096 220.640 0.322

© 2006 copyright by Zhenhao Duan Research Group, Institute of Geology and Geophysics, Chinese Academy of Sciences. All rights reserved.
State Properties State Properties Saturation Properties