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| ABC Chemical Kinetics© | ||||||||||||||||||||||||||||||||
| Jorge A. Carrazana García Universidad de Santiago de Compostela Facultad de Ciencias de Lugo Departamento de Quimica Fisica Lugo 27002 Spain mail to: uscqfjcg@cesga.es | ||||||||||||||||||||||||||||||||
| Abstract | ||||||||||||||||||||||||||||||||
| The system formed by three chemical species "A", "B" and "C" related to each other by elementary reactions, reversible or not, is broadly used in chemical kinetics as a first step in the study of the so-called "complex reactions". This model presents an appropriate combination of mathematical complexity and chemical applicability that transforms it into a didactic resource of great educational value at various levels of Chemical Kinetics, Physical Chemistry or even basic General Chemistry, where reaction rates and mechanisms are of interest. In this collection of worksheets, a step-by-step study of the "ABC" system is accomplished with the aid of Mathcad. Work in real math notation, interactive graphs and symbolic processing allows useful equations to be obtained, transformed and live applied, with the result of clarifying the study goals and objectives. The significance of the different model parameters can be visually determined by perturbing the values and observing the effect alongside. The proposed exercises not only consolidate the concepts and skills but extend the analysis applying the models and methods to other similar systems. The organization of all the material in a format of Mathcad electronic book makes its use easy. The user can learn working with the interactive models, can annotate the book and, at the same time, the original information is conserved stable. The PC's memory handling is more efficient when a group of Mathcad worksheets are part of an electronic book than in the use as individual ones. The "live" book is presented for its use with the versions 7 and 11 of Mathcad. Non-interactive images of the book, in "pdf" and "html" formats are presented too. Even when each worksheet in the book is part of an interconnected group, the different objectives can be worked individually. For this reason every theme is separately introduced and analyzed, and has its own exercises and references. This is graphically showed as rows in the book's Table of Contents. Alternatively, a vertical progression in the Table of Contents implies changes in the objective pursued and, eventually, a more general model under study. | ||||||||||||||||||||||||||||||||
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| Comments to: Jorge A. Carrazana García | ||||||||||||||||||||||||||||||||
| ©Copyright 2003 Journal of Chemical Education | ||||||||||||||||||||||||||||||||
