化学学报 ›› 1992, Vol. 50 ›› Issue (1): 16-21. 上一篇    下一篇

研究论文

等温稀释型量热计的建立和过量焓的测定

闫卫东;林瑞森;严文兴   

  1. 浙江大学化学系
  • 发布日期:1992-01-15

The construction of an isothermal displacement calorimeter and the determination of excess enthalpies

YAN WEIDONG;LIN RUISEN;YAN WENXING   

  • Published:1992-01-15

本文建立了一套等温稀释型量热计, 该量热计可用于吸热型体系过量焓的测定,量热计灵敏度为2μV.J^-^1, 恒温精度为±8*10^-^3K。经环己烷-苯体系和环己烷-正己烷体系在298.15K时标定, 精确度在15%以内, 测定了缔合体系在乙醇 -苯体系303.15K时溶液的过量焓。

关键词: 测定, 焓, 量热计

An isothermal displacement calorimeter was constructed for the determination of excess enthalpies of mixing of endothermal liquid systems. The calorimeter was calibrated with cyclohexane-benzene and cyclohexane-hexane systems at 298.15 K. The precision and accuracy are <1%. The excess enthalpy of ethanol-benzene system was determine at 303.15 K.

Key words: DETERMINATION, ENTHALPY, CALORIMETERS

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