US EPA

1451305 

Journal Article 

Solubility, Density and Solution Thermodynamics of NaI in Different Pure Solvents and Binary Mixtures 

Pawar, RR; Aher, CS; Pagar, JD; Nikam, SL; Hasan, M 

2012 

Yes 

Journal of Chemical and Engineering Data
ISSN: 0021-9568
EISSN: 1520-5134 

57 

12 

3563-3572 

10.1021/je300754n 

WOS:000312175600036 

Solubility of NaI in water, methanol, ethanol, propan-2-ol,
and also in water + methanol, water + ethanol, and water + propan-2-ol binary mixtures have been
experimentally measured using a gravimetric method at temperatures (298.15.303.15, 308.15, and
313.15) K. The combined NIBS (nearly ideal binary solvent)-Redlic-Kister equation is used to fit
experimental solubility data at constant temperature. The densities of the saturated solutions
are also reported in pure and binary solvent mixtures at temperatures mentioned above.
Thermodynamic functions including Delta H-soln(0), Delta G(soln)(0) and Delta S-soln(0) of
solution of NaI are obtained from the modified van't Hoff equation. A comparison of the relative
contributions by enthalpy (zeta H) and entropy (zeta TS) is made which indicated that the main
contributor to the positive standard molar Gibbs energy of solution of NaI is the entropy for
solution of NaI in water + methanol having x(C)(0) < 0.5 and for all other solutions it is
enthalpy.