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State functions

Posted: Sun Jan 10, 2016 11:39 pm
by Nhat Anh Cao 1C
What are some other examples of state functions?

Re: State functions

Posted: Mon Jan 11, 2016 9:24 am
by Chem_Mod
Enthalpy, Entropy, Internal Energy, Potential Energy, etc.

Re: State functions

Posted: Mon Jan 11, 2016 10:28 am
by Kayti Luu 2B
I understand that in a state function what matters is the initial and final, not the path that it takes, but why isn't heat a state function when enthalpy and enthalpy is a measurement of heat?

Re: State functions

Posted: Tue Jan 12, 2016 1:31 am
by Ronald Yang 2F
Hey Kayti,

It's because the path heat takes does matter, since heat is a "transfer" of energy. It only exists during a change, not at the beginning and end of a change.

Re: State functions

Posted: Tue Jan 12, 2016 11:48 am
by AngelinaArianaAviles3G
Hi Kayti,
Heat isn't a state function, it is a path function.
While enthalpy refers to the heat transferred or absorbed in a chemical reaction, it is done so at a constant pressure so the only final and initial are held in to account to calculate the enthalpy of a reaction. Enthalpy is a state property because it can be added.

Also, just as a side note, heat and work are considered the non-state functions. And as professor Lavelle stated, enthalpy, entropy, potential energy, etc. are state functions.