Heat capacities and thermal conductivity of ternary mixtures of water+ethanol+1,2-ethanediol between 75 and 350 K

Citation
Yj. Song et al., Heat capacities and thermal conductivity of ternary mixtures of water+ethanol+1,2-ethanediol between 75 and 350 K, THERMOC ACT, 352, 2000, pp. 255-264
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
THERMOCHIMICA ACTA
ISSN journal
0040-6031 → ACNP
Volume
352
Year of publication
2000
Pages
255 - 264
Database
ISI
SICI code
0040-6031(20000703)352:<255:HCATCO>2.0.ZU;2-J
Abstract
The heat capacities of two concentrations of the ternary systems of 1,2-eth anediol, ethanol and water have been measured with an adiabatic calorimeter in the temperature range 80-350 K. These mixtures exhibited complex phase transitions in the solid state. A very broad heat capacity anomaly starting from 130 to 240 K was observed in the heat capacity curves and three trans ition peaks were found in this temperature range in addition to the melting peak. Experiments have demonstrated that the cooling rates had no obvious influence on the heat capacity anomaly. The thermal conductivity of the ter nary systems were measured with an instantaneous heating wire conductometer in the temperature range from 233.15 to 343.15 K. All of the heat capacity and thermal conductivity results in temperature range between 221 and 350 K were correlated with temperature for practical applications. (C) 2000 Els evier Science B.V. All rights reserved.