H2P2O7-2

Formula : H2P2O7-2

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
175.959 46.904 (Ref.: 97asho/sas) Shock, E.L., Sassani, D.C., Willis, M., and Sverjensky, D.A., 1997, Inorganic species in geologic fluids: Correlations among standard molal thermodynamic properties of aqueous ions and hydroxide complexes: Geochim. Cosmo. Acta, v. 61, no. 5, pp. 907-950. -2027116 (Ref.: 92gre/fug) Grenthe I., Fuger J., Konings R.J.M., Lemire R.J., Muller A.B., Nguyen Trung C., and Wanner H., 1992. Chemical Thermodynamics, Volume 1: Chemical Thermodynamics of Uranium. North Holland, Amsterdam, 1, 714 pp. -2294973 (Ref.: Internal calculation) 163.176 (Ref.: 97asho/sas) Shock, E.L., Sassani, D.C., Willis, M., and Sverjensky, D.A., 1997, Inorganic species in geologic fluids: Correlations among standard molal thermodynamic properties of aqueous ions and hydroxide complexes: Geochim. Cosmo. Acta, v. 61, no. 5, pp. 907-950. 84.39 (Ref.: 97asho/sas) Shock, E.L., Sassani, D.C., Willis, M., and Sverjensky, D.A., 1997, Inorganic species in geologic fluids: Correlations among standard molal thermodynamic properties of aqueous ions and hydroxide complexes: Geochim. Cosmo. Acta, v. 61, no. 5, pp. 907-950.
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
38.0589 60.3747 0.3180 -14.1227 170.0210 2.3033 10.9696
Reaction properties

2H2PO4- ⇌ H2P2O7-2 + H2O

298.15 K, 1 bar log10K: -1.76 ΔH°r:24397 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -2.10 -1.76 -1.25 -0.69 -0.02 0.60 1.17 1.70
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
94.821779 0.015740 -8663.825944 -32.312144 687931.302439