Excess properties from pρT data for n-heptane + isomeric chlorobutane mixtures

• Densities at high pressures of n-heptane with chlorobutanes have been measured.
• Densities have been correlated with composition, temperature and pressure.
• From experimental data excess properties have been calculated and discussed.
• The VTPR model has been used to predict densities with reasonable results.

The densities of the binary mixtures n-heptane + isomeric chlorobutane have been determined in a wide range of both temperatures and pressures (T = 283.15–323.15 K, p = 0.1–65.0 MPa). From experimental densities different excess volumetric properties have been estimated. The results have been discussed taking into account both molecular interactions and structural effects operating in the mixing process. In addition, the densities of the mixtures have been satisfactorily predicted using the VTPR model.

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