Final answer:
A process that is nonspontaneous at low temperatures but spontaneous at high temperatures depends on the values of the enthalpy change (ΔH) and entropy change (ΔS).
Step-by-step explanation:
A process that is nonspontaneous at low temperatures but spontaneous at high temperatures depends on the values of the enthalpy change (ΔH) and entropy change (ΔS). Given the information provided, where ΔH° is positive and ΔS° is negative, we can conclude that at low temperatures the process will be nonspontaneous, and at high temperatures the process will be spontaneous.