乙酸与环己酮-环己烷二元混合液体系的热力学性质  

Thermodynamic Properties of Binary Mixture for Acetic Acid+Cyclohexanone,or+Cyclohexane

作　　者：林明穗[1] 苏志忠[1] 

机构地区：[1]三明学院化学与生物工程系,福建三明365004

出　　处：《三明学院学报》2008年第2期171-175,共5页Journal of Sanming University

摘　　要：常压下测定了乙酸-环己酮和乙酸-环己烷2个二元混合体系纯组分及混合液在303.15-333.15 K温度内全浓度范围的密度,计算了2个混合体系的超额摩尔体积VEm,乙酸-环己酮混合液的VEm呈负偏差,而乙酸-环己烷体系VEm为正值。用Redlich-Kister方程关联不同温度下研究体系的VEm与组分摩尔分数的关系,这2个二元混合系最大标准偏差小于0.5%,说明两者有较好一致性。探讨了极性有机溶剂与其他有机物混合后分子间特殊相互作用。Densities data on mixing for binary mixtures of acetic acid with cyclohexanone,cyclohexane have been measured at 303.15 - 333.15 K and ambient pressure as a function of composition.Excess molar volumes have been determined for the binaries. The excess molar volumes are negative in mixture of acetic acid with cyclohexanone and positive for mixture of cyclohexane. The results are correlated with the Redlich-Kister equation, the maximum standard deviations are lower than 0.5 % for the binaries, The results show the agreement is satisfactory between the calculated and the experimental data. The measured data have been discussed from the viewpoint of the existence specific interactions between polar organic solvent and other organic components.

关 键 词：密度 超额摩尔体积 乙酸 环己酮 环己烷 

分 类 号：TQ013.1[化学工程]