Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/65663
Type: Artigo de periódico
Title: Estimative by DSC data of the sublimation enthalpies for ethyleneurea and propyleneurea: Some empirical correlations with amides and tioamides.
Author: de Farias, RF
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: Delta(cr)(g) H-m(o) (1)/ Delta(cr)(g) H-m(o) (2) = Delta(l)(g) H-m(o) (1)/ Delta(l)(g) H-m(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.
Subject: amides
sublimation enthalpy
vaporization enthalpy
Country: Brasil
Editor: Soc Brasileira Quimica
Rights: aberto
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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