Delta U


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Abigail Menchaca_1H
Posts: 104
Joined: Sat Sep 07, 2019 12:19 am

Delta U

Postby Abigail Menchaca_1H » Sun Mar 15, 2020 11:42 pm

When calculating the internal energy of the system how do you know when to change the sign of q/w?

DarrenKim_1H
Posts: 123
Joined: Fri Sep 20, 2019 12:17 am
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Re: Delta U

Postby DarrenKim_1H » Sun Mar 15, 2020 11:45 pm

Multiple factors indicate whether to change the sign. For example if work is done on the system it is positive and if it is done by then it is negative

Diana A 2L
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Re: Delta U

Postby Diana A 2L » Mon Mar 16, 2020 12:08 am

Also, if heat is released, q is negative, and if it's absorbed, q is positive. Then you use the delta U= q+w equation to determine if overall internal energy is positive or negative.

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: Delta U

Postby Ayushi2011 » Mon Mar 16, 2020 6:08 pm

Depends on whether work is done or work is being done on the system.

Owen-Koetters-4I
Posts: 50
Joined: Fri Sep 28, 2018 12:16 am

Re: Delta U

Postby Owen-Koetters-4I » Mon Mar 16, 2020 8:16 pm

you examine if work is done on or by the system


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