Practice question · Estimate
An ideal gas absorbs 600 J of heat during an isothermal expansion. Set the work it does on its surroundings, in J.
Estimate on a scale from 0 J (0) to 1000 J (1000).
Hints
- What happens to the internal energy of an ideal gas at constant temperature?
- It does not change, so the first law forces the heat and the work to balance exactly.
Show the answer
600 (answers within ±50 count)
Why
For an ideal gas depends only on , so and the first law gives : all 600 J emerges as work. None of the heat is retained, because the temperature has not moved.
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