The enthalpies of ionization of benzoic, o-chloro-, m-chloro-, and p-chloro- benzoic acids in water-DMF mixtures were measured at 298.15K with an LKB-2277 Bioactivity Mointor. The corresponding entropies of ionization...The enthalpies of ionization of benzoic, o-chloro-, m-chloro-, and p-chloro- benzoic acids in water-DMF mixtures were measured at 298.15K with an LKB-2277 Bioactivity Mointor. The corresponding entropies of ionization of the above acids were calculated.The effects caused by solvent and substitutent were explained by interaction between solute and solvent.展开更多
In this paper,the dissolution and dissociation enthalpies of benzoic acid in ethanol water and isopropanol H 2O mixtures have been determined by two kinds of microcalorimeters respectively.Combined with the correspond...In this paper,the dissolution and dissociation enthalpies of benzoic acid in ethanol water and isopropanol H 2O mixtures have been determined by two kinds of microcalorimeters respectively.Combined with the corresponding Gibbs function changes existing in the literature,the dissolution and dissociation entropies have been calculated.Great efforts have been made to interpret the characteristic variations of the transfer enthalpies and entropies according to the skin phase model for solute solvent interactions and the structure alteration of the mixed solvents.展开更多
文摘The enthalpies of ionization of benzoic, o-chloro-, m-chloro-, and p-chloro- benzoic acids in water-DMF mixtures were measured at 298.15K with an LKB-2277 Bioactivity Mointor. The corresponding entropies of ionization of the above acids were calculated.The effects caused by solvent and substitutent were explained by interaction between solute and solvent.
文摘In this paper,the dissolution and dissociation enthalpies of benzoic acid in ethanol water and isopropanol H 2O mixtures have been determined by two kinds of microcalorimeters respectively.Combined with the corresponding Gibbs function changes existing in the literature,the dissolution and dissociation entropies have been calculated.Great efforts have been made to interpret the characteristic variations of the transfer enthalpies and entropies according to the skin phase model for solute solvent interactions and the structure alteration of the mixed solvents.
