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The integration of an ultraviolet-visible spectrometer and a reaction calorimeter

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Abstract

A small ultraviolet-visible absorption spectrometer which uses fibre optic coupled immersion probes has been incorporated into a laboratory scale reaction calorimeter. The combined instrument has been tried out using the hydrolysis of acetic anhydride as a test reaction. With the calorimeter operating in the isoperibolic mode good agreement is found for the pseudo-first order reaction rate constant as determined from spectroscopic and calorimetric measurements. Experiments have been made in order to follow the reaction indirectly using optical pH measurements with acid-base indicators. The possibility of determining the temperature dependence of the rate constant in a single experiment has also been investigated.

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Authors and Affiliations

  1. Dipartimento di Chimica Industriale e Ingegneria dei Materiali, Universita di Messina Salita Sperone, 31 (Casella Postale 29), 98166, Sant'Agata di Messina, Italy

    C. Ampelli, D. Di Bella, D. G. Lister, G. Maschio & J. Parisi

Authors
  1. C. Ampelli
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  2. D. Di Bella
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  3. D. G. Lister
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  4. G. Maschio
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  5. J. Parisi
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Ampelli, C., Di Bella, D., Lister, D.G. et al. The integration of an ultraviolet-visible spectrometer and a reaction calorimeter. Journal of Thermal Analysis and Calorimetry 72, 875–883 (2003). https://doi.org/10.1023/A:1025074400414

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  • DOI: https://doi.org/10.1023/A:1025074400414

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