H3PO4

Formula : H3PO4

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
97.995 48.118 (Ref.: 89bsho/hel) Shock E.L., Helgeson H.C. and Sverjensky D.A., 1989. Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Standard partial molal properties of inorganic neutral species. Geochim. Cosmochim. Acta, 53, pp. 2157-2183. -1149368 (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. -1294120 (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. 161.912 (Ref.: Internal calculation) 90.26 (Ref.: 89bsho/hel) Shock E.L., Helgeson H.C. and Sverjensky D.A., 1989. Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Standard partial molal properties of inorganic neutral species. Geochim. Cosmochim. Acta, 53, pp. 2157-2183.
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
34.6130 51.9577 3.6363 -13.7754 75.1898 7.4170 -0.9205
Reaction properties

H2PO4- + H+ ⇌ H3PO4

298.15 K, 1 bar log10K: 2.14 ΔH°r:8480 J·mol-1 (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.
T(°C) 0 25 60 100 150 200 250 300
log10K 2.03 2.14 2.33 2.58 2.91 3.28 3.72 4.29
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
710.255019 0.112035 -39337.064645 -256.902014 2320664.072577