UO2OH

Formula : UO2OH

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
287.035 14.503 (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 -1094534 (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 -1238071 (Ref.: Internal calculation) -58.158 (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. 4245-426 102.61 (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
15.6440 5.6346 21.8581 -11.8600 85.4565 8.4400 -0.1255
Reaction properties

UO2+ + H2O ⇌ UO2OH + H+

298.15 K, 1 bar log10K: -18.16 ΔH°r:72918 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 -19.30 -18.16 -16.78 -15.48 -14.14 -13.02 -12.07 -11.21
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
260.860128 0.040103 -19758.973634 -95.644948 1063718.152029