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Enthalpies of formation of some 1-chloroalkanes and the CH2-increment in the 1-chloroalkane series

Authors
Journal
The Journal of Chemical Thermodynamics
0021-9614
Publisher
Elsevier
Publication Date
Volume
7
Issue
2
Identifiers
DOI: 10.1016/0021-9614(75)90264-5

Abstract

Abstract Enthalpies of combustion at 298.15 K have been measured for some 1-chloroalkanes and enthalpies of formation derived for the compounds in the liquid and gaseous states. The results are (uncertainties given are twice the overall standard deviation of the mean): ΔH f o(l)/kJ mol −1 ΔH f o(g)/kJ mol −1 1-Chlorobutane −188.15 ± 1.15 −154.63 ± 1.15 1-Chloropentane −213.44 ± 1.25 −175.20 ± 1.25 1-Chlorooctane −291.30 ± 1.87 −238.88 ± 1.87 1-Chlorododecane −392.31 ± 2.40 −321.98 ± 2.46 1-Chlorooctadecane −544.20 ± 2.82 −446.04 ± 3.06 The enthalpies of formation in the gaseous state of these compounds combined with those of chloroethane, (1) and 1-chloropropane, (1) give a CH 2-increment in the series of −(20.95 2 ± 0.14 6) kJ mol −1, where the given uncertainty limit represents twice the overall standard deviation.

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