NaOH

Formula : NaOH

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
39.997 -0.342 (Ref.: 95pok/hel) Pokrovskii, V.A., and Helgeson, H.C., 1995, Thermodynamic properties of aqueous species and the solubilities of minerals at high pressures and temperatures: The system Al2O3-H2O-NaCl: Amer. J. Sci., 295, 1255-1342. -414900 (Ref.: 95pok/hel) Pokrovskii, V.A., and Helgeson, H.C., 1995, Thermodynamic properties of aqueous species and the solubilities of minerals at high pressures and temperatures: The system Al2O3-H2O-NaCl: Amer. J. Sci., 295, 1255-1342. -472774 (Ref.: Internal calculation) 25.104 (Ref.: 95pok/hel) Pokrovskii, V.A., and Helgeson, H.C., 1995, Thermodynamic properties of aqueous species and the solubilities of minerals at high pressures and temperatures: The system Al2O3-H2O-NaCl: Amer. J. Sci., 295, 1255-1342. 117.55 (Ref.: 95pok/hel) Pokrovskii, V.A., and Helgeson, H.C., 1995, Thermodynamic properties of aqueous species and the solubilities of minerals at high pressures and temperatures: The system Al2O3-H2O-NaCl: Amer. J. Sci., 295, 1255-1342.
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
6.1400 -17.5653 30.9620 -10.9010 92.0480 12.5520 -3.0125
Reaction properties

Na+ + H2O ⇌ NaOH + H+

298.15 K, 1 bar log10K: -14.75 ΔH°r:53395 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -15.60 -14.75 -13.76 -12.85 -11.94 -11.19 -10.52 -9.84
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
563.348762 0.085076 -34107.556135 -205.918885 1819214.754856