Densities data of n-hexane, toluene and dichloromethane at temperatures
288.15-413.15 K and at pressures 0.1-60 MPa, determined in our previous work,
were fitted to the modified Tait equation of state. The fitted
temperature-pressure dependent density data were used to calculate the
derived properties: the isothermal compressibility, the isobaric thermal
expansivity, the difference between specific heat capacity at constant
pressure and at constant volume and the internal pressure, over the entire
temperature and pressure intervals specified above. In order to assess the
proposed modeling procedure, a comparison of the obtained values for the
isothermal compressibility and the isobaric thermal expansivity with the
corresponding literature data were performed. The average absolute percentage
deviations for isothermal compressibility were: for n-hexane 2.01-3.64%, for
toluene 0.64-2.48% and for dichloromethane 1.81-3.20%; for the isobaric
thermal expansivity: for n-hexane 1.31-4.17%, for toluene 0.71-2.45% and for
dichloromethane 1.16-1.61%. By comparing the obtained deviations values with
those found in the literature it can be concluded that the presented results
agree good with the literature data.
Modeling of density and calculations of derived volumetric properties for n-hexane, toluene and dichloromethane at pressures 0.1-60 MPa and temperatures 288.15-413.15 K