### Abstract

This work describes an equation of state for calculating the density of aqueous, liquid-phase NaCl solutions, based on an analytical equation for a mixture of hard-sphere ions and dipoles in the mean spherical approximation. The equation gives reasonable accuracy at temperatures from 273 to 973 K, pressures from 0.1 to 1000 MPa, concentrations from 0 to 50 wt.%, and densities higher than 650 kg m^{-3}. The observed data of Hilbert (1979), Rogers and Pitzer (1982) and Urusova (1975) are fitted with only 10 empirically adjusted parameters plus the two water molecule parameters (diameter and dipole moment) which were determined from the density and dielectric properties of water. A comparison of the calculated and observed density data is presented. Errors in the calculated values vary from 0.5 to 1.5% over the whole range of temperature, pressure and concentration. A table of densities at temperatures from 273 to 973 K, pressures from 0.1 to 1000 MPa and concentrations from 0 to 50 wt.% is presented.

Original language | English (US) |
---|---|

Pages (from-to) | 273-287 |

Number of pages | 15 |

Journal | Fluid Phase Equilibria |

Volume | 60 |

Issue number | 3 |

DOIs | |

State | Published - Jan 1 1990 |

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### All Science Journal Classification (ASJC) codes

- Chemical Engineering(all)
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry

### Cite this

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*Fluid Phase Equilibria*, vol. 60, no. 3, pp. 273-287. https://doi.org/10.1016/0378-3812(90)85057-H

**Equation of state of aqueous NaCl solutions over a wide range of temperatures, pressures and concentrations.** / Lvov, Serguei; Wood, R. H.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Equation of state of aqueous NaCl solutions over a wide range of temperatures, pressures and concentrations

AU - Lvov, Serguei

AU - Wood, R. H.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - This work describes an equation of state for calculating the density of aqueous, liquid-phase NaCl solutions, based on an analytical equation for a mixture of hard-sphere ions and dipoles in the mean spherical approximation. The equation gives reasonable accuracy at temperatures from 273 to 973 K, pressures from 0.1 to 1000 MPa, concentrations from 0 to 50 wt.%, and densities higher than 650 kg m-3. The observed data of Hilbert (1979), Rogers and Pitzer (1982) and Urusova (1975) are fitted with only 10 empirically adjusted parameters plus the two water molecule parameters (diameter and dipole moment) which were determined from the density and dielectric properties of water. A comparison of the calculated and observed density data is presented. Errors in the calculated values vary from 0.5 to 1.5% over the whole range of temperature, pressure and concentration. A table of densities at temperatures from 273 to 973 K, pressures from 0.1 to 1000 MPa and concentrations from 0 to 50 wt.% is presented.

AB - This work describes an equation of state for calculating the density of aqueous, liquid-phase NaCl solutions, based on an analytical equation for a mixture of hard-sphere ions and dipoles in the mean spherical approximation. The equation gives reasonable accuracy at temperatures from 273 to 973 K, pressures from 0.1 to 1000 MPa, concentrations from 0 to 50 wt.%, and densities higher than 650 kg m-3. The observed data of Hilbert (1979), Rogers and Pitzer (1982) and Urusova (1975) are fitted with only 10 empirically adjusted parameters plus the two water molecule parameters (diameter and dipole moment) which were determined from the density and dielectric properties of water. A comparison of the calculated and observed density data is presented. Errors in the calculated values vary from 0.5 to 1.5% over the whole range of temperature, pressure and concentration. A table of densities at temperatures from 273 to 973 K, pressures from 0.1 to 1000 MPa and concentrations from 0 to 50 wt.% is presented.

UR - http://www.scopus.com/inward/record.url?scp=0000801474&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000801474&partnerID=8YFLogxK

U2 - 10.1016/0378-3812(90)85057-H

DO - 10.1016/0378-3812(90)85057-H

M3 - Article

AN - SCOPUS:0000801474

VL - 60

SP - 273

EP - 287

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

SN - 0378-3812

IS - 3

ER -