Enthalpies of Combustion of Organic Compounds. III. <scp>d</scp>-, <scp>l</scp>- and <scp>Dl</scp>-Alanines

Abstract

Abstract Enthalpies of combustion of d-, l- and Dl-alanines were measured by oxygen static bomb calorimetry. Derived thermodynamic quantities at 298.15 K for d-, l- and Dl-isomers are as follows: ΔEc°=−1619.24±0.58, −1620.26±0.63 and −1617.97±0.50 kJ mol−1; ΔHc°=−1619.86±0.58, −1620.88±0.63 and −1618.59±0.50 kJ·mol−1; ΔHf°=−561.08±0.71, −560.06±0.76 and −562.35±0.65 kJ mol−1, respectively.