Infinite dilution activity coefficients (IDACs) tell us how far an infinitely dilute mixture is from ideal solution conditions and they are of considerable experimental and theoretical interest. Deviations from ideality indicate whether a solute is particularly good or particularly poor for a given solvent. This means that activity coefficients have a variety of downstream applications, such as for input to chemical engineering models studying liquidvapor coexistence. Ideal solutions are mixtures where the interactions between two solvent molecules are equal to the interactions between two solute molecules and to the interactions between a solvent and a solute molecule. Real solutions, however, do not satisfy this condition; in most cases, solute and solvent molecules have self-interactions which are not identical to their mutual interactions in solution. In this sense, activity coefficients can be interpreted as a measure of the propensity of a solute molecule to interact with the solvent.