论文信息 - Thermodynamic Properties of d- and l-Tartaric Acid in Aqueous and Ethanol Solution at 298.15 K

Thermodynamic Properties of d- and l-Tartaric Acid in Aqueous and Ethanol Solution at 298.15 K

Enthalpies of mixing and excess volumes of d- and l-tartaric acid in aqueous and ethanol solution were measured at 298.15 K. Excess enthalpies of mixing were observed for three different concentrations of aqueous and ethanol solutions of tartaric acid. Enthalpies of mixing were exothermic for all the concentrations in both solvents. Enthalpic stabilization on mixing was increased with decreasing concentration of tartaric acid for both solvents. Excess volumes of d- and l-tartaric acid in aqueous solution showed volume contraction on mixing, but those of d- and l-tartaric acid in ethanol solution showed volume expansion on mixing. Volume contractions of aqueous solution were increased with decreasing concentration of tartaric acid.

M. Fujisawa | M. A. Khan | T. Kimura | and Tadashi Kamiyama

[1] S. Takagi,et al. Excess enthalpies of {CH3(CH2)nCN, n = 5 to 12} + methyl methylthiomethyl sulfoxide or + dimethyl sulfoxide at 298.15 K , 2004 .

[2] R. Goldberg,et al. Standards in isothermal microcalorimetry (IUPAC Technical Report) , 2001 .

[3] S. Takagi,et al. Deuterium Isotope Effect on Excess Enthalpies of Methanol or Ethanol and Their Deuterium Derivatives at 298.15 K , 2001 .

[4] S. Takagi,et al. Excess Enthalpies of Binary Mixtures of Propanediamine+Propanediol at 298.15 K , 1998 .

[5] S. Takagi,et al. Enthalpies of mixing of R‐ and S‐ enantiomers of propane‐1,2‐diol and methyllactate at 298.15 K , 1998 .

[6] B. Koppenhoefer,et al. CHIRAL DISCRIMINATION IN THE LIQUID PHASE : EXCESS VOLUMES OF BINARY MIXTURES OF AMINO ACID DERIVATIVES , 1994 .

[7] M. L. Mcglashan,et al. Chiral discrimination in liquids II. Excess molar enthalpies of {(1 − x)A+ + xA−}, where A denotes fenchone or α-methylbenzylamine , 1983 .

[8] M. L. Mcglashan,et al. Chiral discrimination in liquids. Excess molar volumes of (1 - x)A+ + xA-, where A denotes limonene, fenchone, and .alpha.-methylbenzylamine , 1981 .

[9] S. Takagi,et al. Determination of excess volumes of benzene +o-terphenyl at 288.15, 298.02, and 302.78 K , 1979 .

[10] A. Horeau,et al. Interactions diastereoisomeres d'enantiomeres en phase liquide - II , 1973 .