Question Detail
Question
When ΔH is positive and ΔS is positive, when is the reaction spontaneous?
Correct Answer
Option C is the correct answer.
Detailed Explanation
When ΔH is positive and ΔS is positive, ΔG = ΔH - TΔS becomes negative only at high temperatures where the TΔS term dominates. Thus, the reaction is spontaneous at high temperatures.
Hint
The notes provide a table summarizing these relationships.