## State functions [ENDORSED]

$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$

Nicole Jacobs 1C
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### State functions

Are the only state functions we've learned so far deltaH, detltaG, and deltaU? But the w and q are not state functions?

Cooper1C
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Joined: Fri Sep 29, 2017 7:07 am

### Re: State functions

Delta S is also a state function.

Clara Hu 1G
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### Re: State functions

Heat and work are not state functions because work is proportional to the distance traveled, meaning that the path taken does matter.

Humza_Khan_2J
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Joined: Thu Jul 13, 2017 3:00 am

### Re: State functions

All of the functions you mentioned are state functions, as well as Gibbs free energy. Heat and work depend on the path taken and thus require more analysis to calculate, as opposed to simply final minus initial states.

Natalie LeRaybaud 1G
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Joined: Thu Jul 13, 2017 3:00 am

### Re: State functions

Yes, heat and work (q and w) are not considered state functions because they are dependent on the path taken whereas E, P, V, T, densities, and heat capacity as well as the ones we just learned deltaU, deltaH, deltaG, deltaS are all state functions.

kaushalrao2H
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### Re: State functions

Heat and work are not state functions; they are considered "path-dependent" functions

Guangyu Li 2J
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### Re: State functions

State functions is a property that depends only on the current state of the system and is independent of how that state was prepared. In addition, if the components of a function are all state functions, then the overall equations is a state function. For the U=q+w, since q and w are both not state functions, then U is not a state function.

Hope this helps!

Ramya Lakkaraju 1B
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Joined: Fri Sep 29, 2017 7:03 am

### Re: State functions  [ENDORSED]

Since q and w are not state functions, you cannot do calculations with just final minus initial.