Final answer:
At relatively high temperatures, spontaneous reactions will have a negative change in free energy (ΔG), indicating that the reaction releases free energy and occurs spontaneously. At relatively low temperatures, spontaneous reactions will still have a negative ΔG, but the magnitude of the ΔG will be smaller than at high temperatures.
Step-by-step explanation:
When considering the temperature dependence of spontaneity, it is important to keep in mind that the terms 'high' and 'low' are relative to a reference temperature. A process that is spontaneous at relatively high temperatures will have a negative change in free energy (ΔG).
This means that the reaction releases free energy and occurs spontaneously. On the other hand, a process that is spontaneous at relatively low temperatures will still have a negative ΔG, but the magnitude of the ΔG will be smaller than at high temperatures. It is important to note that the specific reactions and their temperature dependencies may vary.