H2

Formula : H2

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
2.016 25.297 (Ref.: 89bsho/hel, 01sch/sho) 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. AND Schulte M.D., Shock E.L. and Wood R.H., 2001. The temperature dependence of the standard-state thermodynamic properties of aqueous nonelectrolytes. Geochimica et Cosmochimica Acta, 65, 3919-3930 17559 (Ref.: 82wag/eva) Wagman D.D., Evans W.H., Parker V.B., Schumm R.H., Halow I., Bailey S.M., Churney K.L., and Nutall R.L., 1982. The NBS Tables of Chemical Thermodynamic Properties. J. Phys. Chem. Ref. Data, 11, Suppl. 2. -4200 (Ref.: Internal calculation) 57.700 (Ref.: 82wag/eva) Wagman D.D., Evans W.H., Parker V.B., Schumm R.H., Halow I., Bailey S.M., Churney K.L., and Nutall R.L., 1982. The NBS Tables of Chemical Thermodynamic Properties. J. Phys. Chem. Ref. Data, 11, Suppl. 2. 157.76 (Ref.: 89bsho/hel, 01sch/sho) 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. AND Schulte M.D., Shock E.L. and Wood R.H., 2001. The temperature dependence of the standard-state thermodynamic properties of aqueous nonelectrolytes. Geochimica et Cosmochimica Acta, 65, 3919-3930
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
21.5171 19.9819 16.2042 -12.4533 131.6240 12.8629 -1.0075
Reaction properties

H2O ⇌ H2 + 0.5O2

298.15 K, 1 bar log10K: -46.07 ΔH°r:275563 J·mol-1 (Ref.: 82wag/eva) Wagman D.D., Evans W.H., Parker V.B., Schumm R.H., Halow I., Bailey S.M., Churney K.L., and Nutall R.L., 1982. The NBS Tables of Chemical Thermodynamic Properties. J. Phys. Chem. Ref. Data, 11, Suppl. 2.
T(°C) 0 25 60 100 150 200 250 300
log10K -50.44 -46.07 -40.94 -36.14 -31.30 -27.36 -24.09 -21.27
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
192.650557 0.033721 -26491.917585 -68.822847 922334.891147