Density, Speed of Sound, and Refractive Index of Binary Mixtures of Propiophenone + (3-Amino-1-propanol, Propylamine, or Isobutanol) at Temperatures of 298.15 to 308.15 K: Modeling by Prigogine–Flory–Patterson Theory

In the present work, the density, speed of sound, and refractive index of binary mixtures of propiophenone (PP) with 3-amino-1-propanol (AP), propylamine (PA), or isobutanol (IB) were measured over whole composition range at temperatures 298.15 to 308.15 K and ambient pressure (0.1 MPa). From these experimental data the excess molar volume, \({V}_{\text{m}}^{\text{E}}\) $V_{\text{m}}^{\text{E}}$ , excess isoentropic compressibility, \({\kappa }_{\text{S}}^{\text{E}},\) ${\kappa }_{\text{S}}^{\text{E}},$ and excess refractive index, \({n}_{\text{D}}^{\text{E}}\) $n_{\text{D}}^{\text{E}}$ , were calculated. The calculated excess molar properties were correlated by Redlich–Kister equation, and their coefficients and standard deviations were calculated. The results show that the \({V}_{\text{m}}^{\text{E}}\) $V_{\text{m}}^{\text{E}}$ values of PP + AP are positive in the entire composition range and at all temperatures, while the \({V}_{\text{m}}^{\text{E}}\) $V_{\text{m}}^{\text{E}}$ values of PP + PA and PP + IB mixtures are negative over whole composition range and at all temperatures. The obtained \({V}_{\text{m}}^{\text{E}}\) $V_{\text{m}}^{\text{E}}$ values were also correlated by Prigogine–Flory–Patterson (PFP) theory which show good agreement between experimental and predicted data.