Standard molar enthalpies of formation and phase changes of Tetra-N-phenylbenzidine and 4,4′-Bis (N-carbazolyl)-1,1′-biphenyl

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作者
Ernan Adalid Mendoza-Ruiz
Juan Mentado-Morales
Henoc Flores-Segura
机构
[1] Instituto de Industrias de la Universidad del Mar,
[2] Facultad de Ciencias Químicas de la Benemérita Universidad Autónoma de Puebla,undefined
关键词
Energy of combustion of Tetra-; -phenylbenzidine; Energy of combustion of 4,4′-Bis(; -carbazolyl)-1,1′-biphenyl; Enthalpy of formation of Tetra-; -phenylbenzidine; Enthalpy of formation of 4,4′-Bis(; -carbazolyl)-1,1′-biphenyl;
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摘要
The values of the standard molar energies of combustion of Tetra-N-phenylbenzidine and 4,4′-Bis(N-carbazolyl)-1,1′-biphenyl in solid phase were obtained experimentally using an isoperibolic semi-micro combustion calorimeter. The calorimeter was calibrated with benzoic acid NIST 39j and tested with 1,2,4-triazole. The molar enthalpies of combustion in oxygen, at T = 298.15 K and pº = 0.1 MPa were (− 18,522.4 ± 12.1) and (− 18,114.4 ± 12.5) kJ mol−1, respectively. The corresponding standard molar enthalpies of formation were derived as: (354.4 ± 12.9) and (518.1 ± 13.4) kJ mol−1. The vaporization enthalpies of the compounds were obtained by thermogravimetry, and these values were used to derive the enthalpies of formation in gaseous phase.
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页码:2337 / 2345
页数:8
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