Practice question

MCQ

Question

In a process, 300 J of heat is absorbed by a system, and 100 J of work is done on the system. What is Δ U?

Options

Choose one · Correct answer highlighted

400 J Correct 200 J -400 J 100 J

Explanation

Using the first law: Δ U = q + w. Here, q = +300 J (heat absorbed), w = +100 J (work done on system), so Δ U = 300 + 100 = 400 J.

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