The standard (p degrees = 0.1 MPa) molar enthalpies of combustion in oxygen
at T = 298.15 K of three branched alkyl chain carboxylic acids, 2-methylpr
opanoic, 2,2-dimethylpropanoic, and 3-methylbutanoic, were measured by stat
ic bomb combustion calorimetry, from which their standard molar enthalpies
of formation were derived.
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The standard molar enthalpies of formation at T = 298.15 K of the gaseous c
arboxylic acids were derived using literature values of their standard mola
r enthalpies of sublimation or vaporization. (C) 1999 Academic Press.