Evaluation of excess molar volumes of n-butanol with nitrobenzene-aniline-acetonitrile binary liquid mixtures at temperatures of 298.15, 303.15, 308.15, and 313.15 K

The excess molar volumes (V^E_m) of binary liquid mixture defined here: n-butanol and nitrobenzene, n-butanol and aniline, and n-butanol and acetonitrile have been determined as a function of mole fraction of n-butanol at temperatures of 298.15, 303.15, 308.15, and 313.15 K by a calibrated bi-capillary pycnometer. The V^E_m were obtained as negative values over the entire composition range in the order of n-butanol + nitrobenzene, < n-butanol + aniline, and <n-butanol + acetonitrile systems. The negative magnitude of V^E_m suggests the presence of specific intermolecular interaction in the three liquid mixtures.