State functions
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State functions
Just to double check, entropy (S), enthalpy (H) and internal energy (U) are all state functions correct? Are there any others we've learned that I'm missing?
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Re: State functions
Yes, those are all state functions. Others include temperature, pressure, volume,... the list is quite large
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Re: State functions
A good tip I learned is that all state functions are written with capital letters! Hope that makes it a bit easier to remember which ones are considered state functions!
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Re: State functions
If you can do X(final) - X(initial), it is usually a state function! That's how I usually think about it.
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Re: State functions
I saw something to remember some of them which is PVT HUGS (pressure volume temp, enthalpy, internal energy, Gibbs energy, and entropy), might not be all of them but the hugs part helps me remember.
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Re: State functions
Enthalpy, Entropy, Gibbs free energy, internal energy, volume, temp, etc are all state functions. They can be seen in equations with a delta sign and are found by final-initial values.
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Re: State functions
Yes, those are all state functions! We've also learned about other ones such as temperature and Gibbs Free Energy. As long as all the individual units add up to create the final it is a state function (if that makes sense)
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Re: State functions
The way to tell if something is a state function is if the path you get to the final answer doesn't have to be the same to get the same result. For example, the textbook makes the comparison that it's like taking two different paths that lead to the same location on a mountain. A more chemistry oriented example would be if internal energy, which you mentioned. A system can have the same value of internal energy if a.) no work is done on/by it and heat is added or taken away from the system or b.)the system does work/has work done on it and no heat is added/taken away. These are two different methods, but they can both lead to the same value of U.
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Re: State functions
hi! i watched a video where they said to use "private hugs" (p.v.t. h.u.g.s.) as a way to remember all of the state functions- hope this helps!
Re: State functions
yes they are. A good way to remember them is if you can carry out their calculations by just doing final - intial
Re: State functions
There are quite a lot, wikipedia has a pretty good list. But yes those are the ones we covered in class.
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Re: State functions
Yep all the ones listed are state functions and there are several more like temperature for example!
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Re: State functions
Yes, but do not forget temperature as well. Sometimes it is a bit overlooked but it also is determined by Final-Initial!
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Re: State functions
Just to be sure entropy and enthalpy would be state functions because it would depend on the state of your values at the beginning and at the end? Sorry if it didn't makes sense!
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Re: State functions
Yes these are state functions. Remember the diagram Dr. Lavelle drew in class-- if it doesn't matter how you reached from A to B, then this would be a state function.
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Re: State functions
Yes those are all state functions. There are a number of other things that are state functions, including temperature.
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Re: State functions
Hi! Yes, those are all state functions and there are others as well like temperature.
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Re: State functions
They are all state functions! Another state function we learned is Temperature if I remember correctly from the test.
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