Volumetric properties of binary and ternary liquid mixtures of 1-propanol (1) plus 2-propanol (2) plus water (3) at different temperatures and ambient pressure (81.5 kPa)

Excess molar volume, V-m(E), and excess partial molar volume, V-i(E) of the ternary mixtures of 1-propanol (1) + 2-propanol (2) + water (3) and of two binaries of 1-propanol (1) + water (3) and 2-propanol (2) + water (3) have been investigated from the density, rho, measurements over the entire range of composition at temperatures (293.15, 303.15, 313.15, and 323.15) K and at ambient pressure (81.5 kPa). The limiting values of the excess partial molar volumes at infinite dilution, V-i(E,0) and thermal expansion coefficients, alpha, of the pure component are also evaluated. The systems exhibited negative values of V-m(E) that increase with increasing temperatures. The excess molar volumes were correlated with the Redlich-Kister equation and the Cibulka equation for binary and ternary systems, respectively. The excess molar volumes, V-m(E), of the binary mixtures were compared with values from the literature in the region of overlap.