An indirect method of determination of @E02257@ equilibria, such as \(\text{p}K^{\text{*,a}}\) values, based on @G02704@ thermodynamics and electronic transition energies. This cycle considers only the difference in molar @E02141@ change (\(\Delta \Delta H\)) of reaction of ground and excited states, neglecting the difference in molar @E02149@ change of reaction of those states (\(\Delta \Delta S\)).