7. In a process, 701 J 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?
7. In a process, 701 J 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?
7. As per the first law of thermodynamics,
? U= q + W
Heat absorbed by the system, q = 701 J
Work done by the system, W = – 394 J
Change in internal energy? U = q + w = 701 – 394 = 307 J.
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