Volumetric properties of aqueous binary mixtures of 2-diethylaminoethanol from 283.15 to 303.15 K
Volumetric properties of aqueous binary mixtures of 2-diethylaminoethanol from 283.15 to 303.15 K
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DOI：
10.1039/b004348f
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发表时间：
2000
影响因子：
3.3
通讯作者：
M. Barbas;F. Dias;Ângela F. S. S. Mendonça-Ângela-F.-S.-S.-Mendonça-91832707;Isabel M. S. Lampreia
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文献类型：
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作者：
M. Barbas;F. Dias;Ângela F. S. S. Mendonça-Ângela-F.-S.-S.-Mendonça-91832707;Isabel M. S. Lampreia
本文报道了2-二乙氨基乙醇（DEEA）与水二元混合物的体积性质。在283.15 ~ 303.15K的温度范围内测定了密度值与组成的关系。对于DEEA在298.15 K（摩尔体积，133.2 cm 3 mol−1）的测量给出了123.3 cm 3 mol−1的极限偏摩尔体积。为了深入了解研究的混合物中存在的几种聚集模式，在整个组合物和温度范围内计算混合物的过量摩尔体积、DEEA的表观摩尔体积以及两种组分的过量偏摩尔体积。正如预期的那样，整套结果显示出与理想情况的严重偏差。过量摩尔体积表现出负偏差，而DEEA的表观摩尔体积和过量偏摩尔体积表现出复杂的组成和温度依赖性。
We report volumetric properties of the binary mixture of 2-diethylaminoethanol (DEEA) with water. Density values were determined as a function of composition in the temperature range 283.15 to 303.15 K. For the DEEA at 298.15 K (molar volume, 133.2 cm3 mol−1) the measurements have given a limiting partial molar volume of 123.3 cm3 mol−1. To gain some insight into the several aggregation patterns present in the mixtures studied, calculation of excess molar volumes of the mixture, apparent molar volumes of DEEA, as well as excess partial molar volumes of both components were made over the entire composition and temperature ranges. As expected the whole set of results reveals strong deviations from ideality. The excess molar volumes exhibit negative deviations while apparent molar volumes of DEEA and excess partial molar volumes show a complex dependence on composition and temperature.