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Work Done

Posted: Sat Feb 09, 2019 11:28 pm
by makenzie2K
How do we know whether work is being done on the system by the surroundings, or if the surroundings are doing work on the system? How does this change the sign of w?

Re: Work Done

Posted: Sun Feb 10, 2019 12:00 am
by Lauren Ho 2E
If energy leaves a system, the system does work on its surroundings. If energy enters a system, work is done on the system.

Re: Work Done

Posted: Sun Feb 10, 2019 5:23 pm
by caseygilles 1E
Work will have a negative sign if the the system does work on its surroundings, it will be releasing energy to the surroundings. Work will have a positive sign if the surroundings are doing work on the system, aka energy is being gained by the system.