HSiO3-

Formula : HSiO3-

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
77.092 4.887 (Ref.: 97sve/sho) Sverjensky, D.A., Shock, E.L., and Helgeson, H.C., 1997 Prediction of the thermodynamic properties of aqueous metal complexes to 1000 C and 5 kb: Geochim. Cosmo. Acta, v. 61, No. 7, pp. 1359-1412. -1016064 (Ref.: 01fel/cho) Felmy A. R., Cho H., Rustad J. R., and Mason M. J. (2001) An aqueous thermodynamic model for polymerized silica species to high ionic strength. Journal of Solution Chemistry 30(6), 509-525. -1146146 (Ref.: Internal calculation) 20.920 (Ref.: 97sve/sho) Sverjensky, D.A., Shock, E.L., and Helgeson, H.C., 1997 Prediction of the thermodynamic properties of aqueous metal complexes to 1000 C and 5 kb: Geochim. Cosmo. Acta, v. 61, No. 7, pp. 1359-1412. -81.50 (Ref.: 97sve/sho) Sverjensky, D.A., Shock, E.L., and Helgeson, H.C., 1997 Prediction of the thermodynamic properties of aqueous metal complexes to 1000 C and 5 kb: Geochim. Cosmo. Acta, v. 61, No. 7, pp. 1359-1412.
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
12.4411 -2.1581 24.8810 -11.5374 34.0950 -30.5947 6.4898
Reaction properties

H4SiO4 ⇌ HSiO3- + H2O + H+

298.15 K, 1 bar log10K: -9.82 ΔH°r:26884 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -10.26 -9.82 -9.36 -9.03 -8.85 -8.87 -9.06 -9.46
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-183.756715 -0.050580 4698.365146 70.958395 -206426.987302