HUO2

Formula : HUO2

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
271.036 24.903 (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 -828432 (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 -858056 (Ref.: Internal calculation) 221.334 (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 -606.16 (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
21.5986 20.1886 16.1038 -12.4616 -329.9260 -135.9360 -0.1255
Reaction properties

U+3 + 2H2O ⇌ HUO2 + 3H+

298.15 K, 1 bar log10K: -21.19 ΔH°r:202729 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 -24.58 -21.19 -17.63 -14.69 -12.09 -10.27 -8.91 -7.84
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
207.201961 0.028823 -12882.635177 -74.999805 -728471.999928