### Delta U

Posted:

**Thu Jan 26, 2017 9:58 pm**What is the equation that relates delta U, work, and time?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=128&t=18415

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Posted: **Thu Jan 26, 2017 9:58 pm**

What is the equation that relates delta U, work, and time?

Posted: **Fri Jan 27, 2017 10:13 am**

Delta U is the change in internal energy of a system. The change in internal energy (dU) is equal to q+w, where q is the heat lost or gained and w is the work done on or by the system. (du=q+w) In the instance that the process occurs under constant pressure, du=dH+w, because qp=dH. If the process occurs isothermally, then dU=0 and q=-w. I am not sure what you mean by an equation that relates dU, time, and work; sorry I cannot help in that area. I hope this brief explanation helps though!

Posted: **Sat Jan 28, 2017 8:29 pm**

Not sure if we learned it since thermodynamics/thermochemistry doesn't relate to time at all. Maybe you mean temperature? or something like that?