Sytem Behavior

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Jerry_Dar_3C
Posts: 6
Joined: Wed Sep 21, 2016 2:56 pm

Sytem Behavior

Postby Jerry_Dar_3C » Sun Jan 22, 2017 10:17 pm

Why is in necessary to know both delta u/delta h and delta s to predict/describe the state of a system?

Riley Seid 1L
Posts: 13
Joined: Wed Sep 21, 2016 2:55 pm

Re: Sytem Behavior

Postby Riley Seid 1L » Sun Jan 22, 2017 10:51 pm

I believe this is because deltaU, internal energy, doesn't cover the possibility of having a spontaneous process in system without an energy change. For example, energy in a system can remain the same but the volume of a system can increase, expanding the gas due to entropy and not due to any change in energy. If this were to occur and the only data we had was deltaU, we cannot decisively predict/describe the systems behavior.


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