From Bunsen Burners to Fuel Cells: Invoking Energy Transducers To Exemplify “Paths” and Unify the Energy-Related Concepts of Thermochemistry and Thermodynamics

• Autores: Paul W. Hladky
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 86, Nº. 5 (May), 2009, págs. 582-586
• Idioma: inglés
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• Resumen

  • The conversion of chemical energy entirely into thermal energy by Bunsen burners and into thermal energy and electrical energy by fuel cells of varying efficiencies illustrates different paths by which a chemical reaction can occur. Using the efficiency of producing electrical energy as a path label allows all of the energy-related quantities to be plotted as straight lines on one graph. This readily constructed graph provides a convenient summary of these important thermochemical and thermodynamic quantities and clearly distinguishes the path independent quantities from those that are path dependent.