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Reaction Extent Computation of the Decomposition of Pure Nitrogen Tetroxide

Housam Binous
Organization: National Institute of Applied Sciences and Technology
Department: Chemical Engineering Department
URL: http://pageperso.aol.fr/binoushousam/index.html
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The equilibrium reaction considered here is the decomposition of pure nitrogen tetroxide (N2O4) into nitrogen dioxide (NO2). We use the thermodynamic data (constant pressure heat capacities and enthalpies and energies of formation) given in the excellent book by S. I. Sandler (Chemical and Engineering Thermodynamics, 3rd Edition, Wiley 1999) in order to compute the standard heat of reaction and Gibbs free energy of reaction at 298.15 K and 1 bar. We then compute the equilibrium constant at 298.15 K. We derive the expression of the extent of reaction as a function of the equilibrium constant and pressure. We also obtain expressions for the equilibrium constant and standard heat of reaction as a function of temperature. We plot these two functions of temperature in the range 200K to 400K. Finally, we plot the extent of reaction at different pressures (P varying from 0.1 bars to 10 bars) as a function of temperature.

*Engineering > Chemical Engineering
*Science > Chemistry

nitrogen tetroxide decomposition, equilibrium reaction, extent of reaction, equilibrium constant, LeChatelier’, s rule, heat of formation and reaction, Gibbs free energy of formation and reaction
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Decomposition-Reaction-N2O4.nb (129.1 KB) - Mathematica Notebook [for Mathematica 5.2]

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