Effect of temperature on the density and surface tension of aqueous solutions of HMT

被引:0
作者
L. H. Blanco
O. M. Vargas
A. F. Suárez
机构
[1] Universidad Nacional de Colombia,Departamento de Química, Facultad de Ciencias
[2] Universidad Libre,Facultad de Ingeniería
来源
Journal of Thermal Analysis and Calorimetry | 2011年 / 104卷
关键词
Hexamethylenetetramine; HMT; Surface tension; Densities; Aqueous solutions;
D O I
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中图分类号
学科分类号
摘要
In this study, a systematic study of the effect of the temperature on the density and surface tension of HMT (hexamethylentetramine) in water was developed. The density and surface tension were determined at temperatures of 288.15, 293.15, 298.15, 303.15, and 308.15 K. Precise data of surface tension have not been reported previously in literature. From the density measurements, the apparent molar and partial molar volumes were calculated. The apparent molar volume decreases with concentration, the molar partial volume increases with temperature. The surface tension of the aqueous solutions of HMT decreases with concentration. The excess surface concentration was calculated, the values increase with concentration, indicating that the amount of HMT that goes to the interface gas liquid increases at higher concentrations of HMT.
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页码:101 / 104
页数:3
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