本文提出了一套新的用来确定酮、醛、醚和含氮化合物第二维里系数的新方法.在新的非极性流体预估式的基础上,应用对比态原理,给出了酮、醛、醚和含氮化合物极性流体的优化参数,并对其进行了经验关联,使本预估式能应用于大部分非氢键,弱缔合效应的极性流体.并且仅仅需要临界温度、临界压力、偏心因子和对比偶极距作为预估参数.预估结果与最新的高精度的实验数据符合得很好.
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