We selected four combinations of physical property data types (densities of pure compounds and binary mixtures, heats of vaporization of pure compounds, and enthalpies of mixing of binary mixtures) to optimize against (shown in Table , binary mixture densities ( ( )), and binary enthalpies of mixing (Δ ( )). These measurements cover a set of alcohols, esters, ethers, ketones, acids and alkanes, which is further described in Figures and. The 4 training sets in this study are labeled based on which of these measurements are included.