水溶液中四种酰胺与乙醇分子间的异系焓相互作用  

The Study of the Enthalpic Interactions Between Four Kinds of Acidamides and Ethanol in Aqueous Solutions

作　　者：郑晓雯[1] 

机构地区：[1]济宁学院化学与化工系,山东省无机化学重点实验室,山东曲阜273155

出　　处：《济宁学院学报》2014年第3期9-13,共5页Journal of Jining University

摘　　要：310.15K时,利用2277热活性检测仪的流动测量系统测定了乙醇分别与甲酰胺、N,N-二甲基甲酰胺、乙酰胺,N,N-二甲基乙酰胺在水溶液中混合过程焓变以及各自的稀释焓,根据McMillan-Mayer理论关联得到了各级焓作用系数.讨论了不同酰胺与乙醇分子的相互作用机制.结果表明,乙醇与不同酰胺分子的hxy均为正值.不同酰胺与乙醇的hxy大小主要取决于酰胺分子结构的差异,酰胺分子中所含-CH3个数越多,其hxy值越大,故N,N-二甲基乙酰胺与乙醇的焓对作用系数hxy最大,并用溶质-溶质相互作用和溶质-溶剂相互作用理论对结果进行解释.The enthalpies of mixing of aqueous four kinds of acidamides solutions and ethanol solution have been determined at 310.15K by 2277 flow microcalorimetric system. The data have been analyzed in terms of the McMillan-Mayer theory to obtain the enthalpic pair interaction coefficient （hxy） and compared with them .The results show that hxy values between different acidamides and ethanol denpend on the structures of acidamides. Because of the most -CH3 in N, N-dimethyl acetamide, its hxy values is biggest. The results are discussed in terms of solute-solute and solute-solvent interactions theory.

关 键 词：酰胺 乙醇 焓对作用系数 

分 类 号：O642.3[理学—物理化学]