UO3-

Formula : UO3-

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
286.027 12.456 (Ref.: 97bsho/sas) Shock, E.L., Sassani, D.C., and Betz, H., 1997, Uranium in geologic fluids: Estimates of standard partial molal properties, oxidation potentials, and hydrolysis constants at high temperatures and pressures: Geohim. Cosmo. Acta, v. 61, no. 20, pp. 4245-426 -989934 (Ref.: 97bsho/sas) Shock, E.L., Sassani, D.C., and Betz, H., 1997, Uranium in geologic fluids: Estimates of standard partial molal properties, oxidation potentials, and hydrolysis constants at high temperatures and pressures: Geohim. Cosmo. Acta, v. 61, no. 20, pp. 4245-426 -1140457 (Ref.: Internal calculation) -81.588 (Ref.: 97bsho/sas) Shock, E.L., Sassani, D.C., and Betz, H., 1997, Uranium in geologic fluids: Estimates of standard partial molal properties, oxidation potentials, and hydrolysis constants at high temperatures and pressures: Geohim. Cosmo. Acta, v. 61, no. 20, pp. 4245-426 35.92 (Ref.: 97bsho/sas) Shock, E.L., Sassani, D.C., and Betz, H., 1997, Uranium in geologic fluids: Estimates of standard partial molal properties, oxidation potentials, and hydrolysis constants at high temperatures and pressures: Geohim. Cosmo. Acta, v. 61, no. 20, pp. 4245-426
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
17.3167 9.7370 20.2062 -12.0294 116.3250 -6.9860 8.0429
Reaction properties

UO2+ + H2O ⇌ UO3- + 2H+

298.15 K, 1 bar log10K: -36.48 ΔH°r:170532 J·mol-1 (Ref.: 97bsho/sas) Shock, E.L., Sassani, D.C., and Betz, H., 1997, Uranium in geologic fluids: Estimates of standard partial molal properties, oxidation potentials, and hydrolysis constants at high temperatures and pressures: Geohim. Cosmo. Acta, v. 61, no. 20, pp. 4245-426
T(°C) 0 25 60 100 150 200 250 300
log10K -39.20 -36.48 -33.33 -30.45 -27.63 -25.45 -23.77 -22.52
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-330.479348 -0.058240 6130.360949 120.625665 -682611.223930