Isobaric vapor−liquid equilibrium data at an atmospheric pressure of 95.5 kPa are reported for the binary systems 2-methyl propan-2-ol (1) + tetraethoxylsilane (2) and 2-methyl propan-2-ol (1) + 1-phenyl ethanone (2). The experiments are done using a Swietoslawski-type ebulliometer. The liquid-phase mole fraction, x 1 , versus bubble-point temperature, T, measurements are found to be wellrepresented by the Wilson model. The optimum Wilson parameters are used to calculate the vapor-phase composition, activity coefficients, and excess Gibbs free energy. The results are discussed.
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