V.A. Lukyanova

Standard enthalpy of β-alanine formation

In an isoperibolic calorimeter with a stationary bomb, the value of the combustion energy of crystalline β-alanine (ΔcU0) was determined at 298.15 K, from which standard enthalpies of combustion (ΔcU0) and formation (ΔcU0) have been calculated. The obtained results are compared with literature data.

Standard Enthalpies of Formation of Perfluoro(2-methyl-3-oxa)hexanoic and Perfluoro(2,5-dimethyl-3,6-dioxa)nonanoic Acids

The energies of combustion of perfluoro(2-methyl-3-oxa)hexanoic and perfluoro(2,5-dimethyl-3,6-dioxa)nonanoic acids are for the first time measured in a calorimeter with a rotating platinized bomb and used to calculate the standard enthalpies of formation of these compounds in the liquid state. Based on the enthalpies of formation, the contribution from the [-CF2OCF(CF3)-] group to the enthalpies of formation of perfluoro acids is calculated.

Standard enthalpy of formation of fluorinated graphite CF0.96

The energy of combustion ΔcU0 of fluorinated graphite CF0.96 has been determined using an isoperibolic calorimeter with a rotating platinized bomb and the enthalpy of formation ΔfH0 thereof has been calculated. The enthalpy of the dissociation of the C-F bond has been calculated from the obtained value of ΔfH0(CF0.96) and compared with analogous values for the previously investigated C60 fullerene fluorides.