This resulted in a data set of solvation free energies (and hence limiting activities) for 1140 systems, consisting of 107 unique solutes and 73 unique solvents. The Minnesota Solvation Database contained self-solvation free energies at 298.15 K for only 62 of the 148 possible molecules. We therefore instead computed a set of reference self-solvation free energies for all 148 molecules using eq. ( ) with reference vapor pressure and molar volume data . For the 62 molecules for which values were available in the Minnesota Solvation Database, the computed values were found to be consistent. The inclusion of both solvation free energies and self-solvation free energies will allow us to look at the individual contributions to the limiting activity coefficient.