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1998
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February
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Research: Science and Education
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Analysis of Chemical Reactions by Means of Isoconversion Curves: Kx = Constant
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Valeriu Voiculescu, Luminita Simoiu, and Gavril Niac
University of Craiova, Faculty of Science, A. I. Cuza 13, Craiova 1100, ROMANIA
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February 1998
Vol. 75 No. 2
p. 203
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| Abstract |
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For the equilibrium reaction having a gaseous phase, there is established the equation of the isoconversion curve Kx = constant, with variables of pressure and temperature: ln P (atm) = -ln Kx/Delta n -Delta G°T/Delta nRT where Delta G°T is the function of Gibbs for the chemical reaction at the temperature T and pressure p = 1 atm: Delta G°T = Delta H°T -TDelta G°T
For the special case of Kx = 1 (or APT = 0) there is obtained "the curve of normal null affinity". This curve divides the plane ln P- T into two regions. On one side of the curve AP,T > 0, Kx > 1, and the reaction is thermodynamically possible; on the other side, APT < 0, 0<Kx<1 and the conversion of the reactants is poor, or the reaction does not take place. Also discussed are the particularities of these curves for 12 kinds of thermodynamic chemical reactions which are taken in a multivariant or monvariant system.
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| More Information |
 Citation |
Voiculescu, Valeriu; Simoiu, Luminita; Niac, Gavril. J. Chem. Educ. 1998 75 203.
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Keywords |
Physical Chemistry, Thermodynamics, Equilibrium, and Chemical Education Research
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History |
Created:
Last Updated: |
June 28, 1999
June 23, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
1998
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February
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203
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