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Structural effects on the thermochemical properties of cycloalkanones II. Enthalpy of combustion, vapour pressures, enthalpy of sublimation, and standard molar enthalpy of formation in the gaseous phase of cyclopentadecanone

✍ Scribed by P. Jiménez; M.V. Roux; J.Z. Dávalos; M.A. Martı́n-Luengo; J.-L.M. Abboud

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
144 KB
Volume
29
Category
Article
ISSN
0021-9614

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✦ Synopsis

The energy of combustion of cyclopentadecanone has been determined using a static bomb calorimeter. The vapour pressure of the compound was measured over a temperature interval of 18 K, by the Knudsen-effusion technique. Heat capacity measurements between T s 270 K and T s 335 K were carried out by d.s.c. From the experimental results of this work, the standard molar enthalpies of combustion, sublimation, and formation in the crystalline and gaseous state at the temperature 298.15 K, have been derived for cyclopentadecanone: 0 . y1 0 . y 1 0 Ž . Ž . Ž . Ž . Ž ⌬ H cr sy 501.4 " 5.5 kJ mol , ⌬ H s 86.0"0.6 kJ mol , ⌬ H g sy 415.4" f m sub m f m . y1 . 5.5 kJ mol , respectively.

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