Vapor Pressures at Several Temperatures and Excess Functions at 298.15 K of Butanone with Di-n-propyl Ether or Diisopropyl Ether

Abstract

Vapor pressures of butanone + di-n-propyl ether (n-propyl ether) or + diisopropyl ether (isopropyl ether) were measured at seven temperatures between 288.15 K and 323.15 K by a static method. Excess molar enthalpies and volumes were also measured at T = 298.15 K. Reduction of the vapor pressures to obtain activity coefficients and excess molar Gibbs free energies was carried out by fitting the vapor pressure data to the Redlich-Kister correlation according to Barker's method. Azeotropic mixtures with a minimum boiling temperature were observed over the whole temperature range. The apparent excess enthalpy and volume due to the specific interaction between unlike molecules were calculated.