S₄O₆^-²

Formula : S₄O₆^-²

Dernière mise à jour le 25.01.2021

Individual properties (298.15 K)

M g·mol^-1	V° cm³·mol^-1	ΔGº_f J·mol^-1	ΔHº_f J·mol^-1	Sº J·mol^-1·k^-1	C_P J·mol^-1·K^-1
224.260	56.329 (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.	-1040269 (Ref.: Internal calculation)	-1224238 (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.	257.316 (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.	-101.10 (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
42.9580	72.3422	-4.3940	-14.6176	48.9704	-35.1966	9.5416

Reaction properties

S₂O₃^-² + S₂O₄^-² + 2H⁺ ⇌ S₄O₆^-² + H₂O

298.15 K, 1 bar log₁₀K: 27.06 ΔH°_r:-104283 J·mol^-1

T(°C)	0	25	60	100	150	200	250	300
log₁₀K	28.82	27.06	25.25	23.83	22.70	22.12	22.00	22.40

log₁₀K(T) = A + B·T + C·T^-1 + D·log₁₀(T) + E·T⁻² (T in Kelvin)

A	B	C	D	E
1488.148631	0.238918	-76989.541421	-537.940706	5066785.955944