Thermodynamic properties of mixtures containing 1-butyl-2,3-dimethylimidazolium tetrafluoroborate and cyclopentanone or cyclohexanone
| Autor: | Heena Gupta, Vinod Kumar Sharma, Masta Chandrasekhar, Tadikonda Srinivasa Krishna |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Tetrafluoroborate
Isentropic process Dimer Cyclohexanone Thermodynamics 02 engineering and technology Composition (combinatorics) 010402 general chemistry Condensed Matter Physics Cyclopentanone 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound Monomer 020401 chemical engineering chemistry Excess heat Materials Chemistry 0204 chemical engineering Physical and Theoretical Chemistry Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 231:225-237 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2017.02.011 |
| Popis: | The densities, ρ , speeds of sound, u , and molar heat capacities, C P , of 1-butyl-2,3-dimethylimidazolium tetrafluoroborate (1) + cyclopentanone or cyclohexanone (2) mixtures at 293.15, 298.15,303.15 and 308.15 K and excess molar enthalpies, H E of same mixtures at 298.15 K have been measured as a function of composition. The observed ρ , u , and C P values are used to determine excess molar volumes, V E , excess isentropic compressibilities, κ S E and excess heat capacities, C P E . The analysis of V E data in terms of Graph theory has suggested that while 1-butyl-2,3-dimethylimidazolium tetrafluoroborate exists as monomer; cyclopentanone and cyclohexanone exist as mixture of open and cyclic dimer. The analysis of inter-nuclear distances among interacting atoms (predicted by quantum mechanical calculations) also supports the presence of proposed molecular entities in pure and mixed states. It has been observed that V E , κ S E , C P E and H E estimated by Graph theory compare well with their experimental values. |
| Databáze: | OpenAIRE |
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