Thermodynamic properties of 1-alkyl-3-methylimidazolium bromide ionic liquids

• Published in: The Journal of chemical thermodynamics Vol. 39; no. 1; pp. 158 - 166
• Main Authors: Paulechka, Y.U., Kabo, G.J., Blokhin, A.V., Shaplov, A.S., Lozinskaya, E.I., Vygodskii, Ya.S.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2007
• Subjects: 1-Alkyl-3-methylimidazolium bromides; Ionic liquids; Synthesis of high-purity ionic liquids; Thermodynamic properties; Ionic liquids; Thermodynamic properties; Synthesis of high-purity ionic liquids; 1-Alkyl-3-methylimidazolium bromides
• ISSN: 0021-9614; 1096-3626
• DOI: 10.1016/j.jct.2006.05.008

Heat capacities and enthalpies of phase transitions for a series of 1-alkyl-3-methylimidazolium bromide ionic liquids have been measured by adiabatic calorimetry. Thermodynamic properties of the compounds were calculated in the temperature range of (5 to 370)
K. Water was found to have an additive contribution to the heat capacities of [C
4mim]Br in the liquid state above
T
fus and in the solid state below 160
K at
w(H
2O)
⩽
5
·
10
−3.