Alternately, the isokinetic (or isoequilibrium) temperature may be reached by observing that, if a linear relationship is found, then the difference between the Δ H 's for any closely related reactants will be related to the difference between Δ S 's for the same reactants: δ δ Δ Δ H ‡ ‡ = β β δ δ Δ Δ S ‡ ‡ Using the Gibbs free-energy equation, δ δ Δ Δ G ‡ ‡ = ( 1 − − T β β ) δ δ Δ Δ S ‡ ‡