Statistical surface thermodynamics of quaternary liquid systems

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Abstract
Measurements of surface tension were carried out for pentane–hexane–cyclohexane–benzene and pentane–hexane–benzene–toluene at 298.15 K by the differential capillary rise method. The surface tensions of these quaternary liquid systems were also computed theoretically using various empirical and statistical theories of the liquid state. The agreement between theory and the experiment has been found to be fairly good. An attempt has been made to explain the nature of the molecular interactions involved, in the light of excess surface tension whose sign and magnitude depend upon the chain length of the component liquids.

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