COMBUSTION CALORIMETRY OF ORGANIC FLUORINE COMPOUNDS. THE HEATS OF COMBUSTION AND FORMATION OF THE DIFLUOROBENZENES, 4-FLUOROTOLUENE AND m-TRIFLUOROTOLUIC ACID1

Autor:	W. D. Good, Donald W. Scott, J. L. Lacina, J. P. McCullough
Rok vydání:	1962
Předmět:	chemistry Inorganic chemistry Enthalpy Gaseous hydrogen General Engineering Fluorine chemistry.chemical_element Graphite Calorimetry Physical and Theoretical Chemistry Standard enthalpy change of formation Combustion Oxygen
Zdroj:	The Journal of Physical Chemistry. 66:1529-1532
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100814a035
Popis:	The heats of combustion of five aromatic fluorine compounds were determined by a rotating-bomb method of combustion calorimetry. The suitability of m-trifluorotoluic acid (..cap alpha.., ..cap alpha.., ..cap alpha..-trifluoro-m-toluic acid) as a reference substance for the combustion calorimetry of organic fluorine compounds was investigated. The following values, in kcal. mole/sup -1/, are reported for the standard heats of formation, ..delta..Hf/sup 0//sub 298.15/, from graphite and gaseous hydrogen, oxygen, and fluorine: 4(fuorotoluene(g), -34.01; 1,2-difluorobenzene(g), -67.65; 1,3-difluorobenzene(g), -71.35, 1,4-difluorobenzene(g), -70.69, and m-trifluorotoluic acid(c), -251.78.
Databáze:	OpenAIRE
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