Standard molar enthalpies of formation of some methylfuran derivatives

• Published in: Journal of thermal analysis and calorimetry Vol. 100; no. 2; pp. 375 - 380
• Main Authors: Ribeiro da Silva, Manuel A. V., Amaral, Luísa M. P. F.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-05-2010; Springer
• Subjects: Analytical Chemistry; Calorimetry; Chemical thermodynamics; Chemistry; Chemistry and Materials Science; Combustion; Derivatives; Elements, mineral and organic compounds; Enthalpy; Exact sciences and technology; General and physical chemistry; Inorganic Chemistry; Liquids; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Sublimation; Thermodynamic properties; Vaporization; Thermochemistry; 2-Methylfuran; 5-Methyl-2-acetylfuran; 5-Methyl-2-furaldehyde; Energy of combustion; Enthalpy of vaporization; Standard molar enthalpy of formation; Heat of combustion; Furan derivatives; Formation free energy; Aldehyde; Furfural derivatives; Heat of vaporization; Thermodynamic properties
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-009-0636-9

The standard (
p
o
 = 0.1 MPa) molar enthalpies of formation
of the liquid 2-methylfuran, 5-methyl-2-acetylfuran and 5-methyl-2-furaldehyde were derived from the standard molar energies of combustion, in oxygen, at
T
 = 298.15 K, measured by static bomb combustion calorimetry. The Calvet high temperature vacuum sublimation technique was used to measure the enthalpies of vaporization of the three compounds. The standard (
p
o
 = 0.1 MPa) molar enthalpies of formation of the compounds, in the gaseous phase, at
T
 = 298.15 K have been derived from the corresponding standard molar enthalpies of formation in the liquid phase and the standard molar enthalpies of vaporization. The results obtained were −(76.4 ± 1.2), −(253.9 ± 1.9), and −(196.8 ± 1.8) kJ mol
−1
, for 2-methylfuran, 5-methyl-2-acetylfuran, and 5-methyl-2-furaldehyde, respectively.