Jumei Xu, Shating Li, Zuoxiang Zeng
Aug 5, 2019
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Influential Citations
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Journal
Journal of Chemical & Engineering Data
Abstract
The density and the heat capacity at saturation vapor pressure of isoamyl dl-lactate were measured at a temperature range of 288.15–453.65 K using a capillary pycnometer and adiabatic calorimeter, respectively. The Antoine equation was used to correlate the vapor pressure data which was determined with an ebulliometric technique at a temperature range of 374.59–478.56 K, and the deviation between the calculated value and the experimental data was less than 0.87%. On the basis of the Clausius–Clapeyron equation, the vaporization enthalpy of isoamyl dl-lactate at atmospheric pressure boiling point (Tb, 474.89 K) was calculated to be 43.27 kJ/mol. According to the Othmer’s method, the standard vaporization enthalpy, ΔvapH (298.15 K) was estimated using octanol and heptanol as reference substances, and the results are 57.21 and 57.35 kJ/mol, respectively.