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7 mol of a certain monoatomic ideal gas undergoes a temperature increase of 40 K at constant pressure. The increase in the internal energy of the gas in this process is : (Given R = 8.3 JK –1 mol –1 )

1. 5810 J
2. 3486 J
3. 11620 J
4. 6972 J

Correct answer: 3486 J

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