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The Extended Van’t Hoff Equation & Its Significance

Received: 26 July 2017     Accepted: 16 August 2017     Published: 26 September 2017
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Abstract

The well-known van’t Hoff equation in chemical thermodynamics has been extended by making use of the van’t Hoff isotherm, and the relationship between standard Gibbs energy of reaction r and the total entropy change △Stot. The resulting expression and its usefulness in studying the effect of temperature on the equilibria of exothermic and endothermic processes have been discussed in detail. The central role that the total entropy change plays in determining the dependence of equilibrium constant Keq on temperature T has been emphasized.

Published in American Journal of Applied and Industrial Chemistry (Volume 1, Issue 2)
DOI 10.11648/j.ajaic.20170102.12
Page(s) 32-34
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Van't Hoff Equation, Entropy, Exothermic, Endothermic, Haber - Bosch Process

References
[1] Van’t Hoff, J. H. Die Rolle des osmotischen Druckes in der Analogie zwischen Lösungen und Gasen. Z. Physik. Chem. 1887, 1, 481−493.
[2] Atkins, P. W.; de Paula, J. Elements of Physical Chemistry; 6th ed.; Oxford University Press: UK, 2013; p 177–179.
[3] Laidler, K. J.; Meiser, J. H. Physical Chemistry; Benjamin/Cummings, 1982, 62.
[4] Atkins, P. W.; de Paula, J. Atkins’Physical Chemistry; 10th ed.; Oxford University Press, 2014, 255-257.
[5] Levine, I. N. Physical Chemistry; 6th ed.; McGraw-Hill Companies, Inc, 2009; pp 114-115.
[6] Silbey, R. J.; Alberty, R. A.; Bavendi, M. G. Physical Chemistry; 4th ed.; John-Wiley & Sons Inc. 2005,145-148.
[7] Engel, T; Reid, P. Physical Chemistry; Pearson Education, Inc. 2006, 131–133.
[8] Castellan, G. W. Physical Chemistry; 3rd ed.; Addison-Wesley Publishing Company, Inc. 1983; p 203–216.
[9] Gislason, E. A.; Craig, N. C. Criteria for Spontaneous Processes Derived from the Global Point of View. J. Chem. Educ.2013, 90, 584−590.
[10] Atkins, P. W. Four Laws That Drive the Universe; Oxford University Press Inc: New York, 2007; pp 81-99.
[11] Bent, H. A. The Second Law of Thermodynamics: Introduction for Beginners at Any Level. J. Chem. Educ.1962, 39, 491–499.
[12] Smil V. Enriching the Earth: Fritz Haber, Carl Bosch and the transformation of world food production, 1st ed. Cambridge, MA; MIT Press, 2004.
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    Irfan Hassan Lone Jr. (2017). The Extended Van’t Hoff Equation & Its Significance. American Journal of Applied and Industrial Chemistry, 1(2), 32-34. https://doi.org/10.11648/j.ajaic.20170102.12

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    ACS Style

    Irfan Hassan Lone Jr. The Extended Van’t Hoff Equation & Its Significance. Am. J. Appl. Ind. Chem. 2017, 1(2), 32-34. doi: 10.11648/j.ajaic.20170102.12

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    AMA Style

    Irfan Hassan Lone Jr. The Extended Van’t Hoff Equation & Its Significance. Am J Appl Ind Chem. 2017;1(2):32-34. doi: 10.11648/j.ajaic.20170102.12

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  • @article{10.11648/j.ajaic.20170102.12,
      author = {Irfan Hassan Lone Jr},
      title = {The Extended Van’t Hoff Equation & Its Significance},
      journal = {American Journal of Applied and Industrial Chemistry},
      volume = {1},
      number = {2},
      pages = {32-34},
      doi = {10.11648/j.ajaic.20170102.12},
      url = {https://doi.org/10.11648/j.ajaic.20170102.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajaic.20170102.12},
      abstract = {The well-known van’t Hoff equation in chemical thermodynamics has been extended by making use of the van’t Hoff isotherm, and the relationship between standard Gibbs energy of reaction △rG° and the total entropy change △Stot. The resulting expression and its usefulness in studying the effect of temperature on the equilibria of exothermic and endothermic processes have been discussed in detail. The central role that the total entropy change plays in determining the dependence of equilibrium constant Keq on temperature T has been emphasized.},
     year = {2017}
    }
    

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    AB  - The well-known van’t Hoff equation in chemical thermodynamics has been extended by making use of the van’t Hoff isotherm, and the relationship between standard Gibbs energy of reaction △rG° and the total entropy change △Stot. The resulting expression and its usefulness in studying the effect of temperature on the equilibria of exothermic and endothermic processes have been discussed in detail. The central role that the total entropy change plays in determining the dependence of equilibrium constant Keq on temperature T has been emphasized.
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Author Information
  • Department of Chemistry, Government Degree College Kupwara, Srinagar, India

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