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For a binary mixture of a dilute nonvolatile solute in a volatile solvent, an asymptotic expression is derived for isothermal dew-bubble curves in the region just above the solvent critical point. The expression depends only on the solvent coexistence properties and the initial slopes of the continuous critical locus, with no adjustable parameters. It clarifies the mathematical behavior of these curves...
Vapor-liquid equilibria data from the literature for the system benzene+isopropanol are reviewed in detail. The data span a pressure range from 0.1 to 4.1MPa, and indicate azeotropic behavior with the composition of the azeotrope shifting from being benzene-rich at low pressure to isopropanol-rich at high pressure. We attribute this behavior to the nature of the Bancroft point in this system and discuss...
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