화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.64, No.9, 3793-3798, 2019
Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl DL-Lactate
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 (T-b, 474.89 K) was calculated to be 43.27 kJ/mol. According to the Othmer's method, the standard vaporization enthalpy, Delta H-vap (298.15 K) was estimated using octanol and heptanol as reference substances, and the results are 57.21 and 57.35 kJ/mol, respectively.