NEET Physics Laws of Thermodynamics MCQ Question
Which of the following combinations correctly describes the relationship between Gibbs free energy (∆G), enthalpy change (∆H), and entropy change (∆S) in the context of spontaneous processes?
If ∆G is negative, the process is spontaneous regardless of ∆H and ∆S values.
A positive ∆H and positive ∆S can lead to spontaneity if temperature is sufficiently high.
If ∆G is positive, the process is always spontaneous.
For spontaneity, either ∆G must be negative or ∆H must be negative.
Correct Answer
Detailed Explanation
A positive enthalpy change and a positive entropy change can result in a spontaneous process if the temperature is high enough for T∆S to outweigh ∆H, as noted in the context regarding Gibbs free energy.
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