Critical constants of conformed mixtures
Critical constants of conformed mixtures
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DOI：
10.1021/j100844a035
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发表时间：
1969-10
期刊：
影响因子：
--
通讯作者：
A. Kreglewski;W. Kay
中科院分区：
文献类型：
--
作者：
A. Kreglewski;W. Kay
保形解理论的有效性范围进行了测试的临界温度T和压力P的各种各样的二元系统的临界状态的数据是可用的评估。此外，还测定了丙烷与正构烷烃、正己烷与二乙胺或2-丁酮以及二乙胺+ 2-丁酮等五个二元体系的临界温度和压力。用对应态原理表示了总的对势（uiy）和每个等效表面的力常数（eiy）。对于两种惰性液体的混合物，eij等于eij和eij的调和平均值。计算和实验的T和Pc的协议是非常令人满意的混合物组成的分子，不同的大小和形状在很宽的范围内。混合物的临界常数和拟临界常数的方程不涉及任何经验常数。计算很简单，只需要知道纯组分的性质。
The range of validity of the theory of conformal solutions was tested by the evaluation of critical temperatures Tand pressures Pof a wide variety of binary systems for which data on the critical state were available. Additionally, critical temperatures and pressures ofthe following binary systems were determined: five systems of propane with n-alkanes (C< to Cs), n-hexane with diethylamine or 2-butanone, and the diethylamine+ 2-buta-none system. The total pair potentials (üiy) andthe force constants per equivalent surface (eiy) were expressed by means of the general principle of corresponding states. For mixtures of two inert liquids, eiy is equal to the harmonic mean of e {i and eyy. The agreement of calculated and experimental Tand Pc is very satisfactory for mixtures composed of molecules that differ in both size and shape over a wide range. The equations for the critical and the pseudocritical constants of mixtures do not involve any empirical constants. The calculations are simple and require only a knowledge of the properties of the pure components.