物理化学学报 >> 2006, Vol. 22 >> Issue (11): 1419-1422.doi: 10.3866/PKU.WHXB20061122

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α-蒎烯+对伞花烃和β-蒎烯+对伞花烃二元体系超额焓的测定

廖丹葵;孟学林;武向红;陈小鹏;郑丹星;童张法   

  1. 广西大学化学化工学院, 南宁 530004; 北京化工大学化学工程学院, 北京 100029
  • 收稿日期:2006-04-24 修回日期:2006-07-03 发布日期:2006-11-06
  • 通讯作者: 童张法 E-mail:bioche@gxu.edu.cn; zhftong@sina.com

Determination of Excess Enthalpies for Binary Systems of α-Pinene+p-Cymene and β-Pinene+p-Cymene

LIAO Dan-Kui;MENG Xue-Lin;WU Xiang-Hong;CHEN Xiao-Peng;ZHENG Dan-Xing;TONG Zhang-Fa   

  1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P. R. China; School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2006-04-24 Revised:2006-07-03 Published:2006-11-06
  • Contact: TONG Zhang-Fa E-mail:bioche@gxu.edu.cn; zhftong@sina.com

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摘要： 采用BT2.15型Calvet微量量热计常压下测定了α-蒎烯+对伞花烃和β-蒎烯+对伞花烃两个二元体系在298.15 K、308.15 K及318.15 K下的超额焓. 实验数据采用Redlich-Kister方程进行关联, 标准偏差较小. 该两个二元体系的超额焓在全浓度范围内均为正值, 其最大值在摩尔分数x1=0.5附近. 温度对超额焓有一定的影响, 超额焓随温度的升高而增大. 相同温度下, α-蒎烯+对伞花烃体系的超额焓比β-蒎烯+对伞花烃体系的大.

关键词: α-蒎烯, β-蒎烯, 对伞花烃, 超额焓, 微量量热计

Abstract: The excess enthalpies of α-pinene+p-cymene and β-pinene+p-cymene binary systems were determined at 298.15 K, 308.15 K and 318.15 K and at atmospheric pressure by using a Calvet microcalorimeter (BT2.15). The experimental excess enthalpy data were correlated with Redlich-Kister equation and the standard deviations were all very small. It was found that all the excess enthalpies of these two binary systems were positive in the range of the experimental concentrations and reach their maxima when the mole concentration x1 was about 0.5. The excess enthalpies were larger at the higher mixing temperatures. At the same temperatures, the excess enthalpies of α-pinene+p-cymene system were larger than that of β-pinene+p-cymene.

Key words: α-Pinene, β-Pinene, p-Cymene, Excess enthalpy, Microcalorimeter