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Type: Artigo de periódico
Title: Estimative By Dsc Data Of The Sublimation Enthalpies For Ethyleneurea And Propyleneurea: Some Empirical Correlations With Amides And Tioamides [estimativa Por Dsc Das Entalpias De Sublimação Da Etilenouréia E Da Propilenouréia: Algumas Correlações Empíricas Envolvendo Amidas E Tioamidas]
Author: De Farias R.F.
Abstract: By using DSC data, the enthaplies of sublimation for ethyleneurea and propyleneurea, are calculated as 84 and 89 kJ mol-1 respectively. Using the vaporization enthalpy values for dimethylethyleneurea and dimethylprophyleneurea, as obtained from literature, the empirical relation: Δcr g Hm o (1)/ Δcr g Hm o (2) = Δ1 g Hm o (1)/ Δ1 g Hm o(2) = constant, that relate sublimation or vaporization enthalpies of two different substances and of its methylated derivatives, is obtained. Correlations like that are found to another ureas and thioureas.
Rights: aberto
Identifier DOI: 
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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