Determination of Density, Isobaric Thermal Expansivity Coefficient and Isothermal Compressibility Coefficient Correlations for n-Dodecane and n-Nonane, as a Function of Temperature and Pressure.

This work aims to present results of density (ρL), isobaric thermal expansivity coefficient (αP,L) and isothermal compressibility coefficient (kT,L) correlations for n-dodecane and n-nonane as a function of temperature and pressure, able to obtain these properties at any temperature and pressure in the range of 4 °C to 40 °C and 0.1 MPa to 15.0 MPa, with low uncertainties (in the case of n-dodecane: 0.00025 g⋅cm−3 for ρL; 0.00020 °C−1 for αP,L and 0.00022 MPa−1 for kT,L and in the case of n-nonane: 0.00026 g⋅cm−3 for ρL; 0.00006 °C−1 for αP,L and 0.00032 MPa−1 for kT,L). The density measurements were performed using a pycnometer that was calibrated which presents a volume uncertainty of 0.020 cm3. [ABSTRACT FROM AUTHOR]