Molecular energetics of 4-methyldibenzothiophene: An experimental study

The standard (p degrees = 0.1 MPa) molar enthalpy of formation of 4-methyldibenzothiophene, in the gaseous phase, at T = 298.15 K, was derived from the combination of the values of the standard molar enthalpy of formation, in the crystalline phase, at T = 298.15 K, and the standard molar enthalpy of...

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Bibliographic Details
Main Author: Vera L S Freitas (author)
Other Authors: Jose R B Gomes (author), Maria D M C R Ribeiro da Silva (author)
Format: article
Language:eng
Published: 2010
Subjects:
Online Access:https://hdl.handle.net/10216/99160
Country:Portugal
Oai:oai:repositorio-aberto.up.pt:10216/99160
Description
Summary:The standard (p degrees = 0.1 MPa) molar enthalpy of formation of 4-methyldibenzothiophene, in the gaseous phase, at T = 298.15 K, was derived from the combination of the values of the standard molar enthalpy of formation, in the crystalline phase, at T = 298.15 K, and the standard molar enthalpy of sublimation, at the same temperature. The standard molar enthalpy of formation in the crystalline phase, determined from the standard massic energy of combustion, in oxygen, is (70.9 +/- 4.8) kJ . mol(-1) and was measured by rotating-bomb combustion calorimetry. From Calvet microcalorimetry measurements, the standard molar enthalpy of sublimation obtained is (90.3 +/- 0.7) kJ . mol(-1).