Meaning of State Function

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

Meaning of State Function

Postby Andrew F 2L » Sun Jan 26, 2020 8:25 pm

What exactly does it mean that Enthalpy is a state function? Does it just mean it is additive and can be combined with multiple steps? Also, can someone give a quick example of this? Thank you!

Maggie Eberhardt - 2H
Posts: 97
Joined: Sat Jul 20, 2019 12:16 am

Re: Meaning of State Function

Postby Maggie Eberhardt - 2H » Sun Jan 26, 2020 8:27 pm

a state function just means that it's the STATE of the sample, whatever it is, that matters

J_CHEN 4I
Posts: 54
Joined: Tue Nov 14, 2017 3:01 am

Re: Meaning of State Function

Postby J_CHEN 4I » Sun Jan 26, 2020 8:58 pm

A state function is a property that does not depend on the path taken. An example of a state function is temperature. For example, a pot of boiling water at 212 F could be boiled for hours or minutes, in a microwave or an oven, etc., it would still be at 212 F. The path taken does not matter. You most likely already know that temperatures can be added, multiplied, etc.

Eesha Chattopadhyay 2K
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Joined: Fri Aug 09, 2019 12:16 am

Re: Meaning of State Function

Postby Eesha Chattopadhyay 2K » Sun Jan 26, 2020 9:02 pm

state properties are those that are determined by its current state, independent on the path taken to obtain that state.

Shimei_2F
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: Meaning of State Function

Postby Shimei_2F » Sun Jan 26, 2020 9:10 pm

A state function is not dependent on the path taken to obtain that state. One example is density which only depends on the initial and final, not the path taken.

rohun2H
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

Re: Meaning of State Function

Postby rohun2H » Sun Jan 26, 2020 9:11 pm

State function means it is independent of path taken. Work is an example of NOT a state function, it is dependent on path taken.

005206171
Posts: 107
Joined: Wed Sep 18, 2019 12:20 am

Re: Meaning of State Function

Postby 005206171 » Sun Jan 26, 2020 9:13 pm

Enthalpy is a state function because it does not depend on the path taken, only the initial and final values matter.

jisulee1C
Posts: 149
Joined: Thu Jul 25, 2019 12:17 am

Re: Meaning of State Function

Postby jisulee1C » Sun Jan 26, 2020 9:13 pm

In lecture, Lavelle highlighted that a state property (such as enthalpy) is not dependent on the path taken to obtain that state. Some state property examples include E, P, V, T, density, and heat capacity. On the other hand some that are not state peroperties include work (w) and heat (q).

MaggieHan1L
Posts: 100
Joined: Thu Jul 11, 2019 12:17 am

Re: Meaning of State Function

Postby MaggieHan1L » Sun Jan 26, 2020 9:14 pm

All you care about is final and initial so enthalpy of product minus enthalpy of reactants


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