Density, excess volume, and excess coefficient of thermal expansion of the binary systems of dimethyl carbonate with butyl methacrylate, allyl methacrylate, styrene, and vinyl acetate at T=(293.15, 303.15, and 313.15)K

2008 ◽  
Vol 40 (12) ◽  
pp. 1671-1683 ◽  
Author(s):  
Jaime Wisniak ◽  
Gladis Cortez ◽  
René D. Peralta ◽  
Ramiro Infante ◽  
Luis E. Elizalde ◽  
...  
1999 ◽  
Vol 77 (12) ◽  
pp. 2046-2052 ◽  
Author(s):  
Carmen Jarne ◽  
Manuela Artal ◽  
José Muñoz Embid ◽  
Inmaculada Velasco ◽  
Santos Otín

Densities of binary mixtures of 1,1,2-trichlorotrifluoroethane + dibromomethane, + bromochloromethane, or + bromotrichloromethane were measured over their entire composition ranges at 288.15 and 308.15 K. Thermal expansion coefficients (α) and excess molar volumes (VEm) were calculated. Moreover, densities at 298.15 K and pressures up to 80 bar (1 bar = 100 kPa) were determined for these same mixtures. Isothermal compressibilities (KT) of the pure liquids and their mixtures were obtained.Key words: density, excess volume, thermal expansion coefficient, isothermal compressibility.


Author(s):  
Ye.S. Balankina

The paper focuses on the analytical expressions obtained for the volumetric coefficient of thermal expansion depending on the differences in the geometric structure of the initial monosystems, i.e., the geometric factor, for binary systems with a ratio of the particles volumes in the range from 1 to 8, simulated by a granular medium. Within the research, we established the reasons for the differences between the apparent excess function and the excess function of the volumetric coefficient of thermal expansion. In systems consisting of molecules that differ significantly in shape, the main contribution to this difference is made by the different behavior of the packing coefficients of the molecules of the mixed components with temperature, while in systems where molecules are of similar shape the main contribution is made by the difference in their sizes. We estimated the geometric factor contribution to the concentration behavior of the excess functions of the molar volume and the volumetric coefficient of thermal expansion in the water--acetone system, and found that the degree of its influence on the behavior of the excess functions of these properties varies significantly.


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