CaSO4

Formula : CaSO4

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
136.142 -1309996 (Ref.: 53bell/geo) Bell R.P. et George J.H.B., 1953. Trans. Faraday Soc., 49, pp. 619-627 -1448048 (Ref.: Internal calculation) 20.920 (Ref.: 97sve/sho) Sverjensky, D.A., Shock, E.L., and Helgeson, H.C., 1997 Prediction of the thermodynamic properties of aqueous metal complexes to 1000 C and 5 kb: Geochim. Cosmo. Acta, v. 61, No. 7, pp. 1359-1412.
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
Reaction properties

Ca+2 + SO4-2 ⇌ CaSO4

298.15 K, 1 bar log10K: 2.31 ΔH°r:4291 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K 2.29 2.31 2.44 2.63 2.96 3.39 4.01 4.97
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
1720.333975 0.265734 -94254.921676 -623.561033 5497274.462829