एक गैस का अच्चे रोधी पात्र में \(2.5\, atm\) स्थिर वाह्य दाब के विरुद्ध प्रारम्भिक आयतन \(2.50\, L\) से अन्तिम आयतन \(4.50\,L\) तक प्रसार किया जाता है। गैस की आंतरिक ऊर्जा में परिवर्तन \(\Delta U ,\) जूल में होगा

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.