Internal Energy equations

$\Delta U=q+w$

Andrew F 2L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

Internal Energy equations

What equations should I know for internal energy? I have only been able to determine the basic one of Delta U= q+w but There seem to be more I believe that I am not sure of which I need to solve the HW problems. Are there going to be problems that mix enthalpies and those equations with internal energy as well?

Kassidy Ford 1I
Posts: 103
Joined: Sat Aug 17, 2019 12:16 am
Been upvoted: 1 time

Re: Internal Energy equations

You should know (delta)U=q+w, (delta)H=(delta)U+p(delta)V, which can also be written as (delta)H=(delta)U+nR(delta)T. Also know when change in V is 0, (delta)U=q, and when q=0, (delta)U=w. And when there is no change in temperature there is no change in U so that means q=-w.