硝基苯与正十六烷在临界区域的液-液共存曲线  

Liquid - Liquid Coexistence Curves of (Nitrobenzene + Hexadecane) in the Critical Region

作　　者：安学勤[1] 蒋富国[1] 赵海鸿[1] 沈伟国[1] 

机构地区：[1]兰州大学化学系,兰州730000

出　　处：《化学学报》1998年第2期141-146,共6页Acta Chimica Sinica

基　　金：国家自然科学基金(29673019);国家教委基金;甘肃省自然科学基金

摘　　要：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,(?))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.The coexistence curves of (nitrobenzene + hexadecane) have been determined within 10.5 K 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 , ) curves are consistent with the theoretical predictions. The results also have been analyzed to obtain equations of coexistence curves and to discuss the goodness of selected order parameters.

关 键 词：临界现象 液-液共存曲线 硝基苯 正十六烷 

分 类 号：O625.611[理学—有机化学] O623.11[理学—化学]