Densities (ρ) of pure difuryl methane (DFM), n-pentane or n-hexane or n-heptane or n-octane and those of (DFM + n-pentane or n-hexane or n-heptane or n-octane) binary mixtures over the entire composition range, have been measured at (T = 293.15, 298.15 and 303.15) K and atmospheric pressure. Excess molar volumes of each binary system were determined and correlated by the Redlich-Kister equation. The vs x₂isothermsfor the (DFM + n-pentane or n-hexane or n-heptane) binary mixtures exhibit a sigmoidal behavior while that for the (DFM + n-octane) binary system positive deviation for function was observed. The values decreased with temperature increase for each binary systems which suggested a possible structural effects. The data have been used to derive excess partial molar volumes (). Results are discussed in terms of possible geometrical and dispersive intermolecular interactions.

Keywords: Difurylmethane, n-alkane, Excess molar volume, Excess partial molar volume, Binary mixtures, Intermolecular interactions

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