LaO2-

Formula : LaO2-

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
170.904 20.016 (Ref.: 95haa/sho) Haas, J.R., Shock, E.L., and Sassani, D.C., 1995, Rare earth elements in hydrothermal systems: Estimates of standard partial molal thermodynamic properties of aqueous complexes of the rare earth elements at high pressures and temperatures: Geochim. Cosmo. Acta, v. 59, no. 21, pp. 4329-4350. -927593 (Ref.: 95haa/sho) Haas, J.R., Shock, E.L., and Sassani, D.C., 1995, Rare earth elements in hydrothermal systems: Estimates of standard partial molal thermodynamic properties of aqueous complexes of the rare earth elements at high pressures and temperatures: Geochim. Cosmo. Acta, v. 59, no. 21, pp. 4329-4350. -983041 (Ref.: Internal calculation) 141.419 (Ref.: 95haa/sho) Haas, J.R., Shock, E.L., and Sassani, D.C., 1995, Rare earth elements in hydrothermal systems: Estimates of standard partial molal thermodynamic properties of aqueous complexes of the rare earth elements at high pressures and temperatures: Geochim. Cosmo. Acta, v. 59, no. 21, pp. 4329-4350. -430.55 (Ref.: 95haa/sho) Haas, J.R., Shock, E.L., and Sassani, D.C., 1995, Rare earth elements in hydrothermal systems: Estimates of standard partial molal thermodynamic properties of aqueous complexes of the rare earth elements at high pressures and temperatures: Geochim. Cosmo. Acta, v. 59, no. 21, pp. 4329-4350.
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
20.4727 17.4209 17.2289 -12.3470 -186.1520 -101.3340 4.6744
Reaction properties

La+3 + 2H2O ⇌ LaO2- + 4H+

298.15 K, 1 bar log10K: -40.80 ΔH°r:298184 J·mol-1 (Ref.: 95haa/sho) Haas, J.R., Shock, E.L., and Sassani, D.C., 1995, Rare earth elements in hydrothermal systems: Estimates of standard partial molal thermodynamic properties of aqueous complexes of the rare earth elements at high pressures and temperatures: Geochim. Cosmo. Acta, v. 59, no. 21, pp. 4329-4350.
T(°C) 0 25 60 100 150 200 250 300
log10K -45.68 -40.80 -35.43 -30.76 -26.40 -23.16 -20.68 -18.77
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-171.592927 -0.032272 -736.627205 64.124208 -1403040.930429