Electrical Conductivity, Viscosity and Density of NaI in Formamide Solutions in the Temperature Range 35–80°C

✍ Scribed by P. Bruno; C. Gatti; M. Della Monica

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 547 KB
• Volume: 20
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(75)80002-8

✦ Synopsis

In this work the measurements of eleclrical conductivity, viscosity and density of NaI salt in formamide solutions in the composition range %21 mole "4 and in the temperature range 35-8O'C are reported. The experimental data have been analyzed with equations utilized for transport in glassforming liquids. The glass-transition temperatures deduced from conductiviiy and viscosity data. reported in graph against the salt concentration, lie on the same straight line. Alternatively, the experimental conductivity and viscosity data have been analyzed with a three-parameter equation which describes the isothermal composition dependence of transport proccsscs. At the four temperatures used the plots of Ig, and lg, against I/(x 0 -s). where Y,, is the glass-transition concentralion, were linearized by almost the same .Y~, value. The values of the apparent and partial molar volumes of salt_ deduced from density measurements. were found to be close to the value of the molecular volume of nure salt. This fact is intermeted in terms of equivalent cncrgics of the ion-dipole and of the dipole-dipole interactlons.