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The effect of volatiles on the measurement of the reaction heat by differential scanning calorimetry

When gases evolve during a chemical reaction, a fraction of the reaction heat is lost with them. We have analyzed, both theoretically and experimentally, the deviations that this effect can produce on the determination of the reaction heat by differential scanning calorimetry (DSC). It is shown that, even in the absence of gas overheating, deviations related to variations in the sample heat capacity can be substantial in experiments involving very intense DSC peaks. However, experiments performed on thermal decomposition of metal organic salts and on evaporation of liquids have shown that deviations usually arise from gas overheating

This work was partially funded by the Spanish Programa Nacional de Materiales through projects MAT2011-28874-C02-02 and by the Generalitat de Catalunya contract No. 2009SGR185

© Journal of Thermal Analysis and Calorimetry, 2015, vol. 121, núm. 1, p. 187-194

Springer Verlag

Manager: Ministerio de Ciencia e Innovación (Espanya)
Generalitat de Catalunya. Agència de Gestió d’Ajuts Universitaris i de Recerca
Author: García Cano, Eduard
Sánchez-Rodríguez, Daniel
López-Olmedo, Joan Pere
Farjas Silva, Jordi
Roura Grabulosa, Pere
Abstract: When gases evolve during a chemical reaction, a fraction of the reaction heat is lost with them. We have analyzed, both theoretically and experimentally, the deviations that this effect can produce on the determination of the reaction heat by differential scanning calorimetry (DSC). It is shown that, even in the absence of gas overheating, deviations related to variations in the sample heat capacity can be substantial in experiments involving very intense DSC peaks. However, experiments performed on thermal decomposition of metal organic salts and on evaporation of liquids have shown that deviations usually arise from gas overheating
This work was partially funded by the Spanish Programa Nacional de Materiales through projects MAT2011-28874-C02-02 and by the Generalitat de Catalunya contract No. 2009SGR185
Format: application/pdf
Citation: 023403
ISSN: 1388-6150 (versió paper)
1588-2926 (versió electrònica)
Document access: http://hdl.handle.net/10256/10585
Language: eng
Publisher: Springer Verlag
Collection: MICINN/PN 2012-2014/MAT2011-28874-C02-02
AGAUR/2009-2013/2009 SGR-185
Versió postprint del document publicat a: http:dx.doi.org/10.1007/s10973-015-4465-8
Articles publicats (D-F)
Is part of: © Journal of Thermal Analysis and Calorimetry, 2015, vol. 121, núm. 1, p. 187-194
Rights: Tots els drets reservats
Subject: Calorimetria
Calorimetry
Title: The effect of volatiles on the measurement of the reaction heat by differential scanning calorimetry
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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