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

Journal of Thermal Analysis and Calorimetry, ISSN: 1588-2926, Vol: 121, Issue: 1, Page: 187-194
2015
  • 6
    Citations
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  • 12
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    6
    • Citation Indexes
      6
  • Captures
    12

Article Description

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.

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