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Delta U

Posted: Tue Feb 11, 2020 8:29 pm
by Ellis Song 4I
What exactly is ? I know it means internal energy but I'm not sure what that means.

Re: Delta U

Posted: Tue Feb 11, 2020 8:31 pm
by DarrenKim_1H
It refers to the energy contained within a system

Re: Delta U

Posted: Tue Feb 11, 2020 8:32 pm
by DarrenKim_1H
So basically, U = q + w refers to the fact that it is the total energy that the system is involved with, i.e the energy from the heat generated or loss plus the energy of the work done on or against the system

Re: Delta U

Posted: Tue Feb 11, 2020 9:49 pm
by 805097738
this is the internal energy of the system. so w would be the work either done by or on the system and q would be the heat either absorbed or given off by the system. the changes are looked at in the perspective of the system

Re: Delta U

Posted: Tue Feb 11, 2020 10:24 pm
by Subashni Rajiv 1K
When solving for internal energy, it is helpful to keep track of the terms given in relation to the system and not the surroundings.

Re: Delta U

Posted: Tue Feb 11, 2020 11:04 pm
by Jainam Shah 4I
Delta U is basically the internal energy of the system. When a system is isolated the delta U cannot change. Delta U changes by an input of energy via heat transfer or work due to compression/expansion.

Re: Delta U

Posted: Sat Feb 15, 2020 6:03 pm
by Dina Marchenko 2J
It's important to remember than delta U is the change in internal energy rather than just the internal energy of a system. It's a state function that looks at how the internal energy of a system changes over the course of a process (if a system releases or absorbs energy).

Re: Delta U

Posted: Sat Feb 15, 2020 7:31 pm
by Rebekah Alfred 1J
Changes in internal energy are a function of initial and final states. When delta U is zero, a gas still can expand because it is a spontaneous process with an entropy increase.

Re: Delta U

Posted: Sun Feb 16, 2020 8:07 pm
by 805383532
Delta U is the change in internal energy. Internal energy is the energy contained within a system.