【摘要】 利用2277热活性检测仪的流动测量系统测定了310.15 K时,甲酰胺、N,N-二甲基甲酰胺、乙酰胺、N,N-二甲基乙酰胺分别与2,3-丁二醇在水溶液中混合过程焓变以及各自的稀释焓,根据McMillan-May-er理论关联得到了各级焓作用系数.讨论了不同酰胺与2,3-丁二醇的相互作用机制.结果表明,2,3-丁二醇与四种酰胺分子的hxy均为正.不同酰胺与2,3-丁二醇的hxy大小主要取决于酰胺分子结构的差异,N,N-二甲基乙酰胺与2,3-丁二醇的焓对作用系数hxy最大,用溶质-溶质相互作用和溶质-溶剂相互作用理论对结果进行了解释.更多还原

【Abstract】 The enthalpies of mixing of aqueous four kinds of acidamides solutions and 2,3-butanediols solution are determined at 310.15 K by 2277 flow microcalorimetric system.In terms of the McMillan-Mayer theory,the data of the enthalpic pair interaction coefficient(h_xy) are obtained,and the interactions are disscussed.The results show that h_xy values between different acid amides and 2,3-butanediols denpend on the structures of acidamides.Because of the most-CH₃ in N,N-dimethyl acetamide,its h_xy values is biggest.An explaination of the results are given in terms of solute-solute and solute-solvent interactions theory.更多还原