आइए एक उत्क्रमणीय अभिक्रिया पर विचार करें जो तापमान, T पर होती है। इस अभिक्रिया में, \(\Delta \mathrm{H}\) और \(\Delta \mathrm{S}\) दोनों के धनात्मक मान पाए गए। यदि साम्यावस्था तापमान Te है, तो अभिक्रिया स्वतःप्रवर्तित हो जाती है जब :

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.