Thermodynamics of Mixtures Involving Some Linear or Cyclic Ketones and Cyclic Ethers. 2. Systems Containing Tetrahydropyran

Densities ρ, refractive indices n, and volumetric heat capacities Cp/V have been measured at 298.15 K over the whole concentration range for the binary mixtures {tetrahydropyran + 2-pentanone, + 2-heptanone, or + cyclopentanone}. From the experimental data, excess molar volumes VE, excess molar refractions RE, and excess molar isobaric heat capacities were calculated. Deviations of refractive index from ideality were determined by using a deviation function defined on a volume fraction basis, Δnφ. Excess molar enthalpies HE have been measured at the same temperature for the systems {tetrahydropyran + 2-pentanone, + 2-heptanone, + cyclopentanone, or + cyclohexanone}. The discussion of these quantities entails a comparison with the results obtained in part 1 of this series for a homologous set of systems containing tetrahydrofuran.

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