The change in the parameters shows Gmin (the free energy analogue to Emin) to be 1.9 kcal mol -1 lower than Emin, Geq (the free energy analogue to Eeq) 2.7 kcal mol -1 lower than Eeq, and consequently the reorganisation energy (Gmin -Geq) 0.8 kcal mol - 1 higher than its potential energy analogue. These changes suggest that the inclusion of thermal terms, those related to entropy in particular, significantly reduces the barriers at higher driving forces, and with the shift of Geq -towards a more equal responsealso conditions how the ΔG ‡ (ΔGr) function grows. However, the change in θ makes the activation energy much more responsive to changes in thermodynamic driving force. On its own, θG accounts for a reduction of up to 2.5 kcal mol -1 at Geq with respect to θE, and a reduction of at least 1 kcal mol -1 between around ΔGr = -15 and 25 kcal mol -1 . This is significant because, had θ remained the same, the stabilisation would have been lower than 1 kcal for ΔGr ≥ 0 kcal mol -1 , and actually destabilising barriers above ΔGr = 15.7 kcal mol -1 . This exemplifies how it is a complex interplay of the parameters that leads to a specific lowering or increase in energy barriers, even when studying only the effect of thermal corrections. The influence of entropy on reaction barriers is known to explain patterns in selectivity, reaction kinetics, and reaction outcomes, 29 with consequences on the free energy surface including the appearance of entropic intermediates. Here, entropy can be seen to change not just the absolute value of the activation energy itself, but also its responsiveness to reaction energy, with the non-linear parameters allowing to devise approaches to understand its effects.