Table 15. Look-up Table for Trends if a Reaction Is Spontaneous or Not and if It Is Enthalpy- Or Entropy-Driven.

Entropy change (ΔS) and enthalpy change (ΔH)	ΔH < 0	ΔH > 0
ΔS > 0	Exothermic and entropy-driven reaction; spontaneous at any temperature as ΔG < 0	Endothermic and entropy-driven reaction; spontaneous at high temperatures where TΔS is large
ΔS < 0	Exothermic and enthalpy-driven reaction; spontaneous at low temperature where TΔS is small	Endothermic and entropy-driven reaction; nonspontaneous at any temperature as ΔG > 0