Criticality of the [C4mim] [BF4] + Water system

C. A. Cerdeiriña, J. Troncoso, C. Paz Ramos, L. Romani*, V. Najdanovic-Visak, H. J.R. Guedes, J. M.S.S. Esperança, Z. P. Visak, M. Nunes Da Ponte, L. P.N. Rebelo

*Corresponding author for this work

Research output: Chapter in Book/Published conference outputConference publication


A study of the behavior of the response functions of the [C4mim] [BF4] + water ionic binary solution near its liquid-liquid critical point at atmospheric pressure is presented. Phase equililibrium temperatures, which allow to obtain the critical coordinates of this system, are determined. Measurements of the isobaric heat capacity per unit volume in the critical region indicate Ising-like behavior. The slope of the critical line, (dT/dp)c, is estimated by means of Prigogine and Defay's equation using experimentally determined excess volumes and excess enthalpies as a function of temperature. (dT/dp)c is found to be near zero. The consequences of this fact for the global critical behavior of second-order volumetric derivatives are discussed.

Original languageEnglish
Title of host publicationIonic Liquids IIIA
Subtitle of host publication Fundamentals, Progress, Challenges and Opportunities - Properties and Structure
EditorsRobin Rogers, Kenneth Seddon
PublisherAmerican Chemical Society
Number of pages12
ISBN (Print)9780841238930, 0-8412-3893-6
Publication statusPublished - 1 Dec 2005
EventSymposium on Ionic Liquids - Fundamentals, Progress, Challenges and Opportunities - New York, United States
Duration: 7 Sep 200311 Sep 2003

Publication series

NameACS Symposium Series
ISSN (Print)0097-6156


SymposiumSymposium on Ionic Liquids - Fundamentals, Progress, Challenges and Opportunities
Country/TerritoryUnited States
CityNew York


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