The current research examines the thermophysical behavior of systems involving propyl methanoate (PM) and a homologous series of 1-alkanol from 1-hexanol to 1-decanol within the temperature interval 293.15–323.15 K. The primary objective was to elucidate the intermolecular forces and the extent of non-ideality in these systems. The results demonstrate that across all binary systems, the excess molar volume maintained positive values over the entire concentration range. Moreover, these positive deviations in volume become more pronounced with both increasing temperature and elongation of the alcohol’s carbon chain. A consistent negative trend in viscosity deviations was observed for every system, with the deviation magnitude rising as the carbon chain extended. To interpret the volumetric behavior more comprehensively, the PC-SAFT model was employed to model liquid densities. The calculated densities exhibited excellent agreement with the corresponding experimental values across the studied mixtures. Among all investigated mixtures, the propyl methanoate with 1-decanol pair showed the maximum density deviation of 0.81% between experiment and model. The close match between calculated and experimental data attests to the strength of the PC-SAFT formulation in modeling non-ideal interactions in binary mixtures.
