Enthalpies and heat capacities of solution at infinite dilution for tert-butyl chloride and bromide in several alcohols are reported at 30, 35, and 40 °C.The Scaled Particle Theory (SPT), the Sinanoglu, Reiss, and Moura Ramos (SRMR) and the Model Solute (MS) methods were applied to the enthalpies of solvation. Significant differences in the results calculated from these theories were analysed and data discussed in terms of solute–solvent–solvent interactions.