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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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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