Solvation free energy (Δ𝐺 solv ) is a change in Gibbs free energy associated with the transfer of a solute molecule from a gas phase to a solution phase. In our earlier work , we combined two existing correlations , which were developed based on thermodynamic relationships, and formulated a piecewise function that can predict the solvation free energy of a solvent-solute pair for a broad range of temperature: