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Standard molar enthalpy of formation, vapour pressures, and standard molar enthalpy of sublimation of benzanthrone

✍ Scribed by Manuel A.V. Ribeiro da Silva; M.Luı́sa C.C.H. Ferrão; Manuel J.S. Monte; Jorge M. Gonçalves; Fang Jiye

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
269 KB
Volume
31
Category
Article
ISSN
0021-9614

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✦ Synopsis

The standard ( p o = 0.1 MPa) molar enthalpy of combustion at T = 298.15 K of crystalline benzanthrone was determined as c H o m = -(8114.7 ± 2.0) kJ • mol -1 by static-bomb calorimetry, and the standard molar enthalpy of formation of the crystal at T = 298.15 K was derived as f H o m (cr) = -(4.1 ± 3.0) kJ • mol -1 . Vapour pressure as a function of temperature was measured using the mass-loss Knudsen effusion technique, from which the standard molar enthalpy of sublimation at T = 298.15 K was derived as g cr H o m = (126.6 ± 0.6) kJ • mol -1 . The standard molar enthalpy of sublimation at T = 298.15 K was also measured by the quartz oscillator method, g cr H o m = (129.7 ± 2.1) kJ • mol -1 .

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