Excess enthalpies and heat of esterification reaction in ethanol + acetic acid + ethyl acetate + water system at 313.15 K
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The excess enthalpies for ethanol + acetic acid + ethyl acetate + water system in the chemically equilibrium states are determined with the C80 calorimeter (Setaram) equipped with membrane mixing cells at 313.15 K and atmospheric pressure. The quaternary system exhibited positive values of the excess enthalpies over the entire range of mole fractions. The heat of esterification reaction is calculated on the base of data obtained for heat effects in the mixture, and it was found to be − 3.6 ± 0.2 kJ mol−1. The correlation of the data was carried out using NRTL model and Redlich–Kister equation.
KeywordsThermochemistry Excess enthalpy Heat of esterification reaction Calorimetry
The study was supported by Russian Foundation for Basic Research, and N. Tsvetov is grateful for the RFBR Grant 18-33-00148. Alexandra Golikova acknowledges for the Scholarships of President of Russian Federation (SP-2680.2018.1). Maria Toikka is grateful to Russian Foundation of Basic Research for the support of this study (RFBR Project 18-33-20138). Maria Toikka also acknowledges the Scholarships of President of Russian Federation (SP-2140.2016.1). The investigations were carried out using the equipment of the Resource Centre of Thermogravimetric and Calorimetric Research (Research Park of St. Petersburg State University).
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