| Autor: |
Zhang, Mingming, Kamavaram, Venkat, Reddy, Ramana |
| Zdroj: |
Journal of Phase Equilibria & Diffusion; Apr2005, Vol. 26 Issue 2, p124-130, 7p |
| Abstrakt: |
Thermodynamic properties of 1-butyl-3-methylimidazolium chloride (C4mim[Cl]) ionic liquid were determined using thermogravimetric (TG) differential thermal analysis (DTA). A new method called DTA mass-difference baseline, was used to measure the heat capacity and enthalpy change of phase transformation of ionic liquid from DTA curves. Based on this, the changes in standard enthalpy, entropy, and Gibbs energy were determined. The results show that standard enthalpy and entropy changes of C4mim[Cl] increase nonlinearly with increasing temperature, while the standard Gibbs energy change decreases nonlinearly with increasing temperature within the temperature range studied (298–453 K). The standard enthalpy of melting and enthalpy of vaporization were determined to be 0.93 and 11.07 kJ/mol, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink