Densimetric and ultrasonic characterization of urea and its derivatives in water

被引：32
|
作者：
Krakowiak, Joanna [1 ]
Wawer, Jaroslaw [1 ]
Panuszko, Aneta [1 ]
机构：
[1] Gdansk Univ Technol, Fac Chem, PL-80233 Gdansk, Poland
来源：
JOURNAL OF CHEMICAL THERMODYNAMICS | 2013年 / 58卷
关键词：
Density; Speed of sound; Apparent molar volume; Apparent molar isentropic compression; Urea; Hydration; PARTIAL MOLAR VOLUMES; METHYL-SUBSTITUTED UREAS; AQUEOUS-SOLUTIONS; MOLECULAR-DYNAMICS; AB-INITIO; APPARENT; COMPRESSIBILITIES; TETRAMETHYLUREA; PERCHLORATES; TEMPERATURE;
D O I：
10.1016/j.jct.2012.11.007
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The densities at T = (288.15, 293.15, 298.15, 303.15, and 308.15) K and sound velocities at T = 298.15 K have been measured for aqueous solutions of urea, N-methylurea, N,N'-dimethylurea, N,N,N'N'-tetramethylurea, N-ethylurea, N,N'-diethylurea, N-butylurea. From these data the apparent molar volumes, V-Phi the apparent molar isentropic compressions, K-S,K-Phi, and the Passynski solvation numbers of solutes have been determined. The concentration dependencies of the calculated quantities and their limiting values are discussed in terms of solute-solvent and solute-solute interactions. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：211 / 220
页数：10
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