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An ideal gas undergoes isothermal compression from 5m 3 to 1 m 3 against a constant external pressure of 4 Nm –2 . Heat released in this process is used to increase the temperature of 1 mole of Al. If molar heat capacity of Al is 24 J mol –1 K –1 , the temperature of Al increases by :

1. K 3 2
2. K 2 3
3. 1 K
4. 2 K

Correct answer: K 3 2

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