Surface tension of liquid binary mixtures at different temperatures (from 298.15k to 318.15k)
PublisherUniversity of Botswana, www.ub.bw
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Thermodynamic properties of binary liquid mixtures of ketones with alkyl esters, (methyl acetate + cyclohexanone, ethyl acetate + cyclohexanone, methyl acetate + cycloheptanone, methyl acetate + acetophenone, ethyl acetate + acetophenone, methyl acetate + acetone) and esters with esters (ethyl acetate + methyl acetate) have been investigated experimentally at various temperatures in the range 298K to 318K by measurements of surface tensions and density as a function of mole fraction. The properties were also investigated theoretically using Sudgen's equation, containing parachor and density, to predict surface tension values. Most of the experimental and predicted trends of surface tension values as a function of mole fraction showed good agreement. Surface entropies were obtained from surface tension - temperature data, whilst excess molar volumes of the systems were calculated from experimental density values. The density values were fitted onto a polynomial expression before being used for prediction. The information obtained was used to better understand intermolecular interactions between components of the solutions at infinite dilution.