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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > February  >
In the Classroom
Calculating Enthalpy of Reaction by a Matrix Method
Mutasim I. Khalil
Chemistry Department, King Saud University College of Science, Riyadh 11451, Saudi Arabia
Cover
February 2000
Vol. 77 No. 2
p. 185
Abstract
A matrix representation method is suggested to calculate for the enthalpies of chemical reactions from given thermochemical equations using the relation ns = nnet, where n, s, and nnet represent the stoichiometric number matrices of the given reactions, the path matrix, and the stoichiometric number matrix of the equation to be solved. The path s, which shows the number of times that these given equations occur to give the net reaction, is calculated by inspection or by a computer program. Multiplying the path matrix s by the columns matrix of DrH° given would yield the net heat change.
More Information
*  Citation
 Khalil, Mutasim I. J. Chem. Educ. 2000 77 185.
*  Keywords
 Physical Chemistry; Thermal Analysis; Thermodynamics
*  History
 Created:
Last Updated:		 January 5, 2000
April 15, 2005
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