Thermochemical study of two N-benzoyl-N ',N '-dialkylureas

• Type: Article in International Scientific Journal
• Date: 2000

Authors

da Silva, MAVR (Author) FCUP; Maria D M C R Ribeiro da Silva (Author) FCUP; Silva, LCM (Author) Other; Dietze, F (Author) Other; Hoyer, E (Author) Other

Journal

Title: Journal of Chemical Thermodynamics

Vol. 32

Pages: 1113-1119

ISSN: 0021-9614

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 9 Citations

Scopus - 9 Citations

Other information

Authenticus ID: P-000-Z49

DOI: 10.1006/jcht.1000.0527

Abstract (EN): The standard (p(o) = 0.1 MPa) molar enthalpies of combustion in oxygen of crystalline N-benzoyl-N',N'-diethylurea, PhCONHCON(Et)(2) (HBETU) and N-benzoyl-N',N'- diisobutylurea, PhCONHCON(iBu)(2) (HBIBU), were measured at T = 298.15 K by static bomb combustion calorimetry. The standard molar enthalpies of sublimation of both compounds were measured using microcalorimetry. These values were used to derive the standard molar enthalpies of formation of the compounds in their crystalline and gaseous phases, respectively. -Delta (c)u(o)(cr)/(J . g(-1)) Delta H-g(cr)m(o)(kJ . mol(-1)) N-benzoyl-N',N'-diethylurea 29756.9 +/- 9.6 132.2 +/- 1.4 N-benzoyl-N',N'-diisobutylurea 33047.0 +/- 9.3 137.5 +/- 2.9 (C) 2000 Academic Press.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7