ISSN:
1572-9001
Keywords:
Thermochemistry
;
group increments
;
heats of formation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract To facilitate the comparison of the energies of nonisomeric organic compounds, we introduce a new thermochemical reference system. The reference substances, instead of elements, are series of compounds: unbranched alkanes and their selected derivatives (halogenides, ethers, sulfides, and tertiary amines). The relative enthalpies calculated from the heats of formation directly reflect the relative energy of both isomeric and nonisomeric compounds, and they can be used in the calculation of the heats of reaction. The relative enthalpies of the elements (in kJ/mol) are C, −22.846; H2, 43.426; O2, 251.66; N2, −178.62; S, −41.62; F2, 396.12; C12, 94.22; Br2, 8.16; and I2, −107.64.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00681207
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