Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
권호 표지
DOI QR코드

DOI QR Code

Thermodynamics of 2, N-Dimethyl Pyridinium Iodide in Ethanol-Water Mixture under High Pressure

  • Jee, Jong-Gi (Department of Chemistry, Teacher's College, Kyungpook National University) ;
  • Lee, Young-Hwa (Department of Chemistry, Teacher's College, Kyungpook National University) ;
  • Woo, Eui-Ha (Department of Chemistry, Teacher's College, Kyungpook National University) ;
  • Lee, Kyung-Hee (Department of Chemistry, Teacher's College, Kyungpook National University)
  • Published : 1983.06.20
Download PDF
⟨ Previous Next ⟩

Abstract

The ionic association constants (K) of 2, N-dimethyl pyridinium iodide (2NDMPI) in 95 volume percentage ethanol-water mixture were determined by a modified UV and conductance method at $20^{\circ}C{\sim}50^{\circ}C$ under 1 to 2000 bars. The K values increase with increasing pressure and decrease with temperature. The total partial molar volume change (${\Delta}V$) has relatively small negative value and the absolute ${\Delta}V$ value decrease with increasing pressure and temperature. The ion size (a) and solvation number (n) of 2NDMPI were about 5 $\AA$ and changed from 1 to 3 with decreasing temperature. Other thermodynamic parameters such as enthalpy (${\Delta}H^{\circ}$) and entropy (${\Delta}S^{\circ}$) for the equilibrium of the 2NDMPI were evaluated. From all the parameters mentioned above, we came to conclusion that the electrostriction effect of 2NDMPI in the ethanol-water mixture is enhanced with increasing pressure and decreasing temperature.

Keywords

References

  1. J. Amer. Chem. Soc. v.77 E. M. Kosower
  2. Phys. Rev. v.38 N. E. Danforth
  3. J. Phys. Chem. v.65 B. B. Owen;R. C. Miller;C. E. Milner
  4. Proc. Amer. Acad. Arts. Sci. v.61 P. W. Bridgman
  5. Physik, Z. v.26 E. Huckel
  6. Jour. Franklin Inst. v.225 T. Shedlovsky
  7. Ph. D. thesis, University of Hanyang J. G. Jee
  8. J. Phys. Chem. v.82 P. Hemmes;J. N. Costanzo;F. Jordan
  9. Izu. Akad. Nauk. USSR, Otd. Khim. Nauk M. G. Gonikberg;B. S. El'yanov
  10. Amer. J. of Sci. v.256 G. C. Kennedy;W. L. Knight;W. H. Holser
  11. J. Amer. Chem. Soc. v.78 E. M. Kosower;J. C. Burbach
  12. J. Amer. Chem. Soc. v.80 R. M. Fuoss
  13. Aust. J. Chem. v.28 S. D. Hamann
  14. J. Korean Chem. Soc. v.18 J. G. Jee;J. J. Jung;J. U. Hwang
  15. J. Korean Chem. Soc. v.24 J. U. Hwang;S. D. Yoh;J. G. Jee
  16. J. Korean Chem. Soc. v.24 O. C. Kwun;J. G. Jee;J. R. Kim
  17. J. Phys. Chem. v.68 S. D. Hamann;P. J. Pearce;W. J. Strauss
  18. Physico-Chemical Effects of Pressure S. D. Hamann
  19. Acta Physucichim., USSR v.8 I. R. Keichevskii
  20. Zeit. Phys. v.1 M. Born
  21. Bull. Chem. Soc. Japan v.46 K. Tamura;Y. Ogo;T. Imoto

Cited by

  1. Apparent Molar Volume and Viscosity ofN-Methylpyridinium Iodide and Its Methyl-Substituted Derivatives in Water vol.63, pp.5, 1990, https://doi.org/10.1246/bcsj.63.1503
  2. Conductivity ofN-Methylpyridinium Iodide and Its Methyl Substituted Derivatives in Water–Ethanol Mixture vol.64, pp.12, 1983, https://doi.org/10.1246/bcsj.64.3718