Trona(Na)

Formula : Na3H(CO3)2:2H2O

Family: 
Carbonates
Space group: 
Monoclinic - Prismatic HM symbol (2/m) Space Group: I2/a
Dana class: 
13.1.4.1V - 13 Carbonate Minerals ; 13.1 Acid Carbonates with miscellaneous formulae ; 12.1.6

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
226.026 107.000 (Ref.: 95rob/hem) Robie R.A., and Hemingway B.S., 1995. Thermodynamic properties of minerals and related substances at 298.15 K and 1 Bar (105 Pascals) pressure and at higher temperatures. U.S. Geol. Survey Bull., 2131, 461 pp. -2380893 (Ref.: 84har/mol) Harvie C.E., Moller N., and Weare J.H.. 1984, The prediction of mineral solubilities in natural waters: The Na-K-Mg-Ca-H-Cl-SO4-OH-HCO3-CO3-CO2-H2O system to high ionic strengths at 25 C. Geochimica Cosmochimica Acta, 48, pp. 723-751. -2682100 (Ref.: 82van) Vanderzee C.E., 1982. Thermodynamic relations and equilibria in (Na2CO3 + NaHCO3 + H2O): Standard Gibbs energies of formation and other properties of sodium hydrogen carbonate, sodium carbonate heptahydrate, sodium carbonate decahydrate, trona: (Na2CO3CNaHCO3C2H2O), and Wegscheider's salt: (Na2CO3C3NaHCO3). J. Chem. Thermodynamics, 14, 219-238 302.436 (Ref.: Internal calculation) 270.00 (Ref.: 82van) Vanderzee C.E., 1982. Thermodynamic relations and equilibria in (Na2CO3 + NaHCO3 + H2O): Standard Gibbs energies of formation and other properties of sodium hydrogen carbonate, sodium carbonate heptahydrate, sodium carbonate decahydrate, trona: (Na2CO3CNaHCO3C2H2O), and Wegscheider's salt: (Na2CO3C3NaHCO3). J. Chem. Thermodynamics, 14, 219-238
CP(T) = a + b·T + ·c·T-2 (T in Kelvin)
a
J·mol-1·K-1
 b * 103
J·mol-1·K-2
 c * 10-5
J·K·mol-1
 Maier Kelley Ref.
270.00 0.00 0.00 (Ref.: 82van) Vanderzee C.E., 1982. Thermodynamic relations and equilibria in (Na2CO3 + NaHCO3 + H2O): Standard Gibbs energies of formation and other properties of sodium hydrogen carbonate, sodium carbonate heptahydrate, sodium carbonate decahydrate, trona: (Na2CO3CNaHCO3C2H2O), and Wegscheider's salt: (Na2CO3C3NaHCO3). J. Chem. Thermodynamics, 14, 219-238
Reaction properties

Trona(Na) + H+ ⇌ 2HCO3- + 3Na+ + 2H2O

298.15 K, 1 bar log10K: 9.28 ΔH°r:9560 J·mol-1 (Ref.: 82van) Vanderzee C.E., 1982. Thermodynamic relations and equilibria in (Na2CO3 + NaHCO3 + H2O): Standard Gibbs energies of formation and other properties of sodium hydrogen carbonate, sodium carbonate heptahydrate, sodium carbonate decahydrate, trona: (Na2CO3CNaHCO3C2H2O), and Wegscheider's salt: (Na2CO3C3NaHCO3). J. Chem. Thermodynamics, 14, 219-238
T(°C) 0 25 60 100 150 200 250 300
log10K 9.10 9.28 9.44 9.58 9.68 9.68 9.51 9.01
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1565.103736 -0.236085 85975.659412 570.876533 -4995091.824037