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The determination of the standard molar enthalpy of formation of 4-chlorobenzoic acid by micro rotating-bomb combustion calorimetry

✍ Scribed by Rui C. Santos; Hermı́nio P. Diogo; Manuel E. Minas da Piedade

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
142 KB
Volume
31
Category
Article
ISSN
0021-9614

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✦ Synopsis

The application of a micro rotating-bomb combustion calorimeter to chlorinecontaining organic compounds was tested by determining the standard massic energy of combustion and the standard molar enthalpy of formation of 4-chlorobenzoic acid at 298.15 K. Experiments with samples of masses in the range 25.5 mg to 39.5 mg led to c u o = -(19563.45 ± 4.88) J • g -1 and f H o m (C 7 H 5 O 2 Cl, cr) = -(429.9 ± 2.2) kJ • mol -1 in good agreement with the corresponding values recommended in the literature.

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