Combustion calorimetry of organic fluorine compounds. The heats of combustion and formation of the difluorobenzenes, 4-fluorotoluene and m-trifluorotoluic acid

Journal Article · Wed Aug 01 04:00:00 EDT 1962 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100814a035· OSTI ID:7319840

Good, W D; Lacina, J L; Scott, D W; McCullough, J P

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.

• Research Organization: Bureau of Mines, Bartlesville, OK
• OSTI ID: 7319840
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 66; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AROMATICS
CALORIMETRY
COMBUSTION HEAT
ENERGY
ENTHALPY
FLUORINATED AROMATIC HYDROCARBONS
HALOGENATED AROMATIC HYDROCARBONS
HEAT
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION HEAT
THERMODYNAMIC PROPERTIES