M. R. D. Silva, J. Cabral
Aug 1, 2006
Citations
0
Influential Citations
8
Citations
Journal
The Journal of Chemical Thermodynamics
Abstract
Abstract The standard ( p ∘ = 0.1 MPa) molar energies of combustion in oxygen of 2-piperidinemethanol, 3-piperidinemethanol, and 4-piperidinemethanol, all in the crystalline phase, were measured, at T = 298.15 K, by static bomb calorimetry. These values were used to derive the standard molar enthalpies of combustion and the standard molar enthalpies of formation, in the condensed phase, for these compounds. Further, the standard molar enthalpies of sublimation, at T = 298.15 K, of these three piperidinomethanol isomers were determined by Cavet microcalorimetry. The combustion calorimetry results together with those from the Calvet microcalorimetry, were used to derive the standard molar enthalpies of formation, at T = 298.15 K, in the gaseous phase, of the three piperidinemethanol studied. - Δ c H m ∘ ( cr ) Δ cr g H m ∘ kJ · mol −1 kJ · mol −1 2-Piperidinemethanol 3890.70 ± 0.92 93.02 ± 0.50 3-Piperidinemethanol 3895.3 ± 1.1 95.9 ± 1.4 4-Piperidinemethanol 3891.3 ± 1.1 98.31 ± 0.69