Question Detail
Question
Which of the following must be negative for a reaction to be spontaneous at constant temperature and pressure?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The Gibbs free energy change (ΔG) determines spontaneity under constant temperature and pressure. A negative ΔG (ΔG < 0) indicates that the process is spontaneous in the forward direction.
Hint
Which thermodynamic function is specifically used to predict spontaneity at constant T and P?