Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10216/97916
Autor(es): | da Silva, MAVR Ana I M C L Lobo Ferreira Ana Filipa L. O. M. Santos Ferreira, CMA Barros, DCB Reis, JAC Costa, JCS Calvinho, MMG Rocha, SIA Pinto, SP Freire, SSL Almeida, SM Guimaraes, VS Almeida, VNM |
Título: | Enthalpies of combustion, vapour pressures, and enthalpies of sublimation of the 1,5-and 1,8-diaminonaphthalenes |
Data de publicação: | 2010 |
Resumo: | The standard (p degrees = 0.1 MPa) molar enthalpies of formation, in the crystalline state, of 1,5-diaminonaphthalene and 1,8-diaminonaphthalene were derived from the standard molar energies of combustion, in oxygen, at T = 298.15 K, measured by static-bomb combustion calorimetry. The Knudsen mass-loss effusion technique was used to measure the dependence of the vapour pressure of the solid isomers of diaminonaphthalene with the temperature, from which the standard molar enthalpies of sublimation were derived using the Clausius-Clapeyron equation. [GRAPHICS] Combining these two experimental values, the gas-phase standard molar enthalpies of formation, at T = 298.15 K, were derived and compared with those estimated using two different empirical methods of Delta fH degrees(m)(g) estimation: the Cox scheme and the Benson's Group Method. Moreover, the standard (p degrees = 0.1 MPa) molar entropies and Gibbs energies of sublimation, at T = 298.15 K, were derived for the two diaminonaphthalene isomers. |
Assunto: | Química física, Engenharia química Physical chemistry, Chemical engineering |
Áreas do conhecimento: | Ciências da engenharia e tecnologias::Engenharia química Engineering and technology::Chemical engineering |
URI: | https://hdl.handle.net/10216/97916 |
Tipo de Documento: | Artigo em Revista Científica Internacional |
Condições de Acesso: | restrictedAccess |
Aparece nas coleções: | FCUP - Artigo em Revista Científica Internacional |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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48515.pdf Restricted Access | 346.08 kB | Adobe PDF | Request a copy from the Author(s) |
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