[Z.sub.n]: is the molal
percentage of each carbon number (Cn), mol%,
Relative Partial Molal
Heat Content and Heat Capacity
Y' = molal
Use the obtained freezing point depression to estimate the molal
concentration of sodium chloride in the unknown solution.
Helgeson, "SUPCRT92: A software package for calculating the standard molal
thermodynamic properties of minerals, gases, aqueous species, and reactions from 1 to 5000 bar and 0 to 1000[degrees]C," Computers & Geosciences, vol.
convention facilitates subsequent development.
Betz, "Uranium in geologic fluids: estimates of standard partial molal
properties, oxidation potentials, and hydrolysis constants at high temperatures and pressures," Geochimica et Cosmochimica Acta, vol.
Shock, "Aldehydes in hydrothermal solution: Standard partial molal
thermodynamic properties and relative stabilities at high temperatures and pressures," Geochimica et Cosmochimica Acta, vol.
where c is the molal
concentration of aqueous components, [gamma] is the thermodynamic activity coefficient, K is the equilibrium constant, subscripts i and j mean the index of the aqueous complexes and basis species, respectively, the subscript i also means the ith reaction to composing the ith aqueous complexes, is the stoichiometric coefficient of jth basis species in the ith reaction, and Nc is the total number of basis species.
where [[mu].sup.AQ(0).sub.i] is the standard chemical potential of species i in an ideal aqueous solution with a hypothetical unit molality ; [m.sub.sol] is the molality (in mole/Kg water, molal
for short hereafter) of salt in the aqueous phase; [N.sub.w] is the mole number of 1kg water (55.508); [x.sub.i] is the mole fraction of species i dissolved in the aqueous phase; at is activity of component i in aqueous phase; and y is activity coefficient of component i.
Behavior in aqueous sodium nitrate solutions; 25-300[degrees]C, 0-6 molal
," Geochimica et Cosmochimica Acta, vol.