Page 1 of 1

Delta U

Posted: Sun Mar 15, 2020 11:42 pm
by Abigail Menchaca_1H
When calculating the internal energy of the system how do you know when to change the sign of q/w?

Re: Delta U

Posted: Sun Mar 15, 2020 11:45 pm
by DarrenKim_1H
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

Re: Delta U

Posted: Mon Mar 16, 2020 12:08 am
by Diana A 2L
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.

Re: Delta U

Posted: Mon Mar 16, 2020 6:08 pm
by Ayushi2011
Depends on whether work is done or work is being done on the system.

Re: Delta U

Posted: Mon Mar 16, 2020 8:16 pm
by Owen-Koetters-4I
you examine if work is done on or by the system