Heat Capacity Function, Enthalpy of Formation and Absolute Entropy of Mg(AlH4)2

In this investigation, we set out first to characterize the thermodynamics of Mg(AlH4)2 and secondly to use the determined data to reevaluate and update existing estimation procedures for heat capacity functions, enthalpies of formation and absolute entropies of alanates. Within this study, we repor...

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Bibliographic Details
Published in:Chemphyschem 2024-01, Vol.25 (2), p.e202300748-n/a
Main Authors: Habermann, Franziska, Wirth, Anneliese, Burkmann, Konrad, Störr, Bianca, Seidel, Jürgen, Gumeniuk, Roman, Bohmhammel, Klaus, Mertens, Florian
Format: Article
Language:English
Subjects:
Calorimetry
Enthalpy
Entropy
Heat Capacity
Heats of Formation
Hydrides
Specific heat
Thermodynamics
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Summary:In this investigation, we set out first to characterize the thermodynamics of Mg(AlH4)2 and secondly to use the determined data to reevaluate and update existing estimation procedures for heat capacity functions, enthalpies of formation and absolute entropies of alanates. Within this study, we report the heat capacity function of Mg(AlH4)2 in the temperature range from 2 K to 370 K and its enthalpy of formation and absolute entropy at 298.15 K, being -70.6±3.6 ${ - 70.6 \pm 3.6}$  kJ mol−1 and 133.06 J (K mol)−1, respectively. Using these values, we updated and expanded methods for the estimation of thermodynamic data of alanates. Thermodynamic data for Mg(AlH4)2, reported in this study, were used to evaluate and update estimation procedures for heat capacity functions, enthalpies of formation and absolute entropies of alanates.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.202300748