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1. In a process 701J of heat is absorbed by a system and 394 J of work is done by the system. What is the change in internal energy for the process? 2. What is free expansion? What is the work done during free expansion of an ideal gas?

Answer»

1. ∆U= q + w = 9 + w = 701J – 394 J = 307J 

2. Expansion of a gas in vacuum is called free expansion. No work is done during free expansion of an ideal gas whether the process is reversible or irreversible.



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