The molar enthalpies of glucose solution, in the mixtures of some heterocyclic compounds and formamide, have been determined at 298.15 K by a C-80 colarimeter. Depending on the McMillan-Mayer theory, the values of pai...The molar enthalpies of glucose solution, in the mixtures of some heterocyclic compounds and formamide, have been determined at 298.15 K by a C-80 colarimeter. Depending on the McMillan-Mayer theory, the values of pair and triplet interaction parameters h_ xy, h_ xyy and h_ xxy between solutes have been fitted by using a least square method. The information about the solute-solute interaction and the effect of solvent on the interaction were discussed.展开更多
The dilution enthalpies of formamide in aqueous ethylene glycol solutions were determined by using a CSC- KG-1/54400 isothermal calorimeter at 298.15 K. The homogeneous enthalpic interaction coefficients in the range ...The dilution enthalpies of formamide in aqueous ethylene glycol solutions were determined by using a CSC- KG-1/54400 isothermal calorimeter at 298.15 K. The homogeneous enthalpic interaction coefficients in the range of ethylene glycol mass fraction（0%\40%） were calculated according to the excess enthalpy concept. The results show that enthalpic pair interaction coefficients h 2 of formamide are negative in aqueous ethylene glycol solutions and pass through a minimum at w≈0.20 of ethylene glycol in mixed solvents.展开更多
文摘The molar enthalpies of glucose solution, in the mixtures of some heterocyclic compounds and formamide, have been determined at 298.15 K by a C-80 colarimeter. Depending on the McMillan-Mayer theory, the values of pair and triplet interaction parameters h_ xy, h_ xyy and h_ xxy between solutes have been fitted by using a least square method. The information about the solute-solute interaction and the effect of solvent on the interaction were discussed.
文摘The dilution enthalpies of formamide in aqueous ethylene glycol solutions were determined by using a CSC- KG-1/54400 isothermal calorimeter at 298.15 K. The homogeneous enthalpic interaction coefficients in the range of ethylene glycol mass fraction（0%\40%） were calculated according to the excess enthalpy concept. The results show that enthalpic pair interaction coefficients h 2 of formamide are negative in aqueous ethylene glycol solutions and pass through a minimum at w≈0.20 of ethylene glycol in mixed solvents.
