Experimental determination of the enthalpy of formation of dibenzo- p-dioxin
The standard molar enthalpy of combustion of dibenzo- p -dioxin (DD) was measured at T= 298.15 K by static-bomb combustion calorimetry: ΔcHmo(cr) =−(5723.8 ± 1.4)kJ · mol−1. The standard molar enthalpy of sublimation of this compound was measured by microcalorimetry: ΔcrgHmo= (91.45 ± 0.76)kJ · mol−...
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Published in | The Journal of chemical thermodynamics Vol. 34; no. 3; pp. 385 - 390 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.03.2002
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Subjects | |
Online Access | Get full text |
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Summary: | The standard molar enthalpy of combustion of dibenzo- p -dioxin (DD) was measured at T= 298.15 K by static-bomb combustion calorimetry: ΔcHmo(cr) =−(5723.8 ± 1.4)kJ · mol−1. The standard molar enthalpy of sublimation of this compound was measured by microcalorimetry: ΔcrgHmo= (91.45 ± 0.76)kJ · mol−1. These values were used to derive the standard molar enthalpies of formation of DD in the crystalline and gaseous states: ΔfHmo(cr) =−(141.6 ± 2.1)kJ · mol−1and ΔfHmo(g) =−(50.1 ± 2.2)kJ · mol−1. The specially obtained sample of DD of high purity {mole fraction x= (0.9999 ± 0.0001)} was used in all measurements. |
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ISSN: | 0021-9614 1096-3626 |
DOI: | 10.1006/jcht.2001.0951 |