SiF6-2

Formula : SiF6-2

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
142.076 42.392 (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. -2199533 (Ref.: Internal calculation) -2389064 (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. 122.173 (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. -185.70 (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
35.6941 54.5979 2.5987 -13.8846 17.1418 -52.8393 11.5964
Reaction properties

6F- + H4SiO4 + 4H+ ⇌ SiF6-2 + 4H2O

298.15 K, 1 bar log10K: 26.23 ΔH°r:-61424 J·mol-1 (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.
T(°C) 0 25 60 100 150 200 250 300
log10K 27.38 26.23 25.29 24.77 24.69 25.12 26.09 27.81
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
3193.413896 0.496948 -174587.216506 -1152.467354 10838296.866116