Isobaric and Isochoric Heat Capacities of Imidazolium-Based and Pyrrolidinium-Based Ionic Liquids as Function of Temperature: Modeling of Isobaric Heat Capacity

Edward Zorebski, Michał Zorębski, Marzena Dzida, Peter Goodrich, Johan Jacquemin

Research output: Contribution to journalArticle

21 Citations (Scopus)
238 Downloads (Pure)

Abstract

The isobaric and isochoric heat capacities of seven 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imides, two 1-alkyl-1-methylpyrrolidinium bis(trifluoromethyl-sulfonyl)imides, and two bis(1-alkyl-3-methylimidazolium) tetrathiocyanatocobaltates were determined at atmospheric pressure in the temperature range from 293.15 K to 323.15 K. The isobaric heat capacities were determined by means of differential scanning calorimetry, whereas isochoric heat capacities were determined along with isothermal compressibilities indirectly by means of the acoustic method from the speed of sound and density measurements. Based on the experimental data, as expected, the isobaric heat capacity increases linearly with increasing alkyl chain length in the cation of 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imides and no odd and even carbon number effect is observed. After critical comparison of the obtained data with the available literature data, the most reliable values are recommended. It has been also shown that although the COSMOthermX calculations underestimated the isobaric heat capacity values whatever the temperature and the ionic liquid structure, the approach used during this work may be applied to estimate physical properties of non-single charged ions as well. Additionally, based on the speeds of sound the thermal conductivities were calculated using a modified Bridgman relation.
Original languageEnglish
JournalIndustrial and Engineering Chemistry Research
Early online date01 Feb 2017
DOIs
Publication statusEarly online date - 01 Feb 2017

Bibliographical note

doi: 10.1021/acs.iecr.6b04780

Fingerprint Dive into the research topics of 'Isobaric and Isochoric Heat Capacities of Imidazolium-Based and Pyrrolidinium-Based Ionic Liquids as Function of Temperature: Modeling of Isobaric Heat Capacity'. Together they form a unique fingerprint.

Cite this