化学学报 ›› 1998, Vol. 56 ›› Issue (2): 141-146. 上一篇    下一篇

研究论文

硝基苯与正十六烷在临界区域的液-液共存曲线

安学勤;蒋富国;赵海鸿;沈伟国   

  1. 兰州大学化学系
  • 发布日期:1998-02-15

Liquid-liquid coexistence curves of (nitrobenzene + hexadecane) in the critical region

AN XUEQIN;JIANG FUGUO;ZHAO HAIHONG;SHEN WEIGUO   

  • Published:1998-02-15

用折射率法在离临界温度10.5K范围内测定了硝基苯+正十六烷的温度-折射率(T, n)共存曲线, 通过标准曲线法转化得到温度-摩尔分数(T, x)和温度-体积分数(T, φ)共存曲线, 进而求得临界指数, 与理论值一致。分析实验数据, 给出描述三条共存曲线的方程, 并讨论了选定的序参量的有效性。

关键词: 硝基苯, 折射率, 临界指数, 十六烷

The coexistence curves of (nitrobenzene + hexadecane) have been determined within 10.5K from the critical temperature by measurements of refractive index. The critical exponent β deduced from temperature-refractive index (T, n), temperature-mole fraction (T, x), and temperature-volume fraction (T, φ) curves are consistent with the theoretical predictions. The results also been analyzed to obtain equations of coexistence curves and to discuss the goodness of selected order parameters.

Key words: NITROBENZENE, REFRACTIVITY, CRITICAL EXPONENT, DIOCTYL

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