Practice question · Numerical answer
A gas absorbs 800 J of heat while doing 300 J of work on its surroundings. Compute the change in its internal energy, in J.
Hints
- Heat entering is positive; work done BY the gas reduces its energy.
- Compute 800 - 300.
Show the answer
500 (answers within ±5 count)
Why
J. The gas keeps only what it does not spend pushing on its surroundings.
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