1 L.atm =101.325 J
When 2.00 kJ of energy is transferred as heat to nitrogen in a cylinder fitted with a piston at an external pressure of 2.00 atm, the nitrogen gas expands from 2.00 to 5.00 L against this constant pressure. What is ∆U for the process?
2. −0.608 kJ
3. +1.39 kJ
4. +2.61 kJ
5. −2.61 kJ
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