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Two moles of an ideal monoatomic gas occupies a volume V at 27ºC. The gas expands adiabatically to a volume 2 V . Calculate (a) the final temperature of the gas and (b) change in its internal energy -

1. (a) 189 K (b) 2.7 kJ
2. (a) 195 K (b) – 2.7 kJ
3. (a) 189 K (b) –2.7 kJ
4. (a) 195 K (b) 2.7 kJ Students may find similar question in CP exercise sheet : [ JEE Main, Chapter : Thermodynamics, Exercise # 4, Q. No. 22 ]

Correct answer: (a) 189 K (b) –2.7 kJ

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