S2-2

Formula : S2-2

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
 V°
cm3·mol-1
 ΔGºf
J·mol-1
 ΔHºf
J·mol-1
 Sº
J·mol-1·k-1
 CP
J·mol-1·K-1
64.132 19.967 (Ref.: 88sho/hel) Shock E.L. and Helgeson H.C., 1988. Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Correlation algorithms for ionic aqueous species and equation of state predictions to 5 kb and 1000C. Geochim. Cosmochim. Acta, 52, pp. 2009-2036. 84634 (Ref.: Internal calculation) 35040 (Ref.: 04chi) Chivot J., 2004. Thermodynamique des produits de corrosion. Fonctions thermodynamiques de solubilite, diagrammes E-pH des systemes Fe-H2O, Fe-CO2-H2O, Fe-S-H2O, Cr-H2O et Ni-H2O en fonction de la temperature. Document ANDRA, Collection Sciences et Techniques. 28.450 (Ref.: 04chi) Chivot J., 2004. Thermodynamique des produits de corrosion. Fonctions thermodynamiques de solubilite, diagrammes E-pH des systemes Fe-H2O, Fe-CO2-H2O, Fe-S-H2O, Cr-H2O et Ni-H2O en fonction de la temperature. Document ANDRA, Collection Sciences et Techniques. -259.63 (Ref.: 88sho/hel) Shock E.L. and Helgeson H.C., 1988. Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Correlation algorithms for ionic aqueous species and equation of state predictions to 5 kb and 1000C. Geochim. Cosmochim. Acta, 52, pp. 2009-2036.
HKF coefficients
a1·10
J·mol-1·bar-1
 a2·10-2
J·mol-1
 a3
J·K·mol-1·bar-1
 a4·10-4
J·K·mol-1
 c1
J·mol-1·K-1
 c2·10-4
J·K·mol-1
 ω·10-5
J·mol-1
23.3455 24.4454 14.4499 -12.6378 -14.0147 -68.1804 13.0051
Reaction properties

1.5HS- + 0.25S2O3-2 ⇌ S2-2 + 0.75H2O

298.15 K, 1 bar log10K: -3.33 ΔH°r:8189 J·mol-1 (Ref.: 04chi) Chivot J., 2004. Thermodynamique des produits de corrosion. Fonctions thermodynamiques de solubilite, diagrammes E-pH des systemes Fe-H2O, Fe-CO2-H2O, Fe-S-H2O, Cr-H2O et Ni-H2O en fonction de la temperature. Document ANDRA, Collection Sciences et Techniques.
T(°C) 0 25 60 100 150 200 250 300
log10K -3.47 -3.33 -3.18 -3.05 -2.91 -2.81 -2.72 -2.65
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-67.494608 -0.008305 3584.189689 23.253269 -259683.062197