抄録
Physical properties of two binary systems, isopropyl alcohol-water and isopropyl alcohol-benzene, are determined experimentally. The kinds of physical properties observed are density, refractive index, viscosity and surface tension, whose data are useful for the analysis of binary mixtures. The smoothed data are presented in Table 2 (a). (b) and Figures 1 to 5 (a), (b).
Inspection of the Tables and Figures reveals that there are maximums in the viscosity vs. composition curves as well as in refractive index vs. composition curves, for the system isopropyl alcohol-water and that there exists a minimum in the relation between viscosity and composition for the system isopropyl alcohol-benzene. A small addition of isopropyl alcohol is found to reduce the surface tension of water markedly
Parachor and molar refractions are calculated, using the data obtained as above, and it is confirmed that these quantities are linearly correlated with molar composition, except for the parachor of the system isopropyl alcohol-water. Molar refraction is also confirmed to be independent of temperature within the range of experiments. Furthermore, some discussions are made on the theoretical relations between surface tension or viscosity and composition.
