State Function






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Erik Buetow 1F
Posts: 96
Joined: Fri Aug 30, 2019 12:15 am

State Function

Postby Erik Buetow 1F » Sun Feb 09, 2020 8:16 pm

Are we able to use Hess's law to help determine Gibbs free energy because they are both state functions or is there a separate reason?

Kaylee Sepulveda 4G
Posts: 100
Joined: Thu Jul 11, 2019 12:16 am

Re: State Function

Postby Kaylee Sepulveda 4G » Sun Feb 09, 2020 8:19 pm

Gibbs free energy is a state function since it's defined in terms of thermodynamic properties that are also state functions. Hess's law can be used for both changes in entropy and in Gibbs free energy.

JohnWalkiewicz2J
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Joined: Thu Jul 11, 2019 12:17 am
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Re: State Function

Postby JohnWalkiewicz2J » Sun Feb 09, 2020 8:21 pm

Yeah pretty much, since ΔG= ΔH - TΔS and all those components are state functions, you could assume ΔG is also a state function.

Cavalli_1H
Posts: 92
Joined: Thu Sep 19, 2019 12:15 am

Re: State Function

Postby Cavalli_1H » Sun Feb 09, 2020 8:24 pm

hess's law can also be applicable to gibbs free energy for the reason of it being a state property

Mariana Fuentes 1L
Posts: 43
Joined: Wed Nov 15, 2017 3:00 am

Re: State Function

Postby Mariana Fuentes 1L » Sun Feb 09, 2020 8:25 pm

You can use it. You just have to make sure you arrange the equations to be equal to delta G.

DesireBrown1J
Posts: 98
Joined: Wed Sep 18, 2019 12:18 am

Re: State Function

Postby DesireBrown1J » Sun Feb 09, 2020 8:51 pm

Cavalli_1H wrote:hess's law can also be applicable to gibbs free energy for the reason of it being a state property


How is it explained and applied to Gibbs free energy?

Megan Vu 1J
Posts: 101
Joined: Thu Jul 25, 2019 12:15 am

Re: State Function

Postby Megan Vu 1J » Mon Feb 10, 2020 12:25 pm

Hess's law can be applied to Gibb's equation because Gibb's is a state function.

Because they are state functions, they are able to be added or subtracted together since the pathway is not dependent on them. In this, Gibbs is able to be added or subtracted when given specific equations of formation or any other values. This is why calculating the enthalpy through the Hess' Law is similar to calculating Gibb's.

JesseAuLec1Dis1G
Posts: 52
Joined: Mon Jun 17, 2019 7:23 am

Re: State Function

Postby JesseAuLec1Dis1G » Mon Feb 10, 2020 1:27 pm

Since it is a state function it is not path dependent. This is why we can use Hess's law, because the pathway doesn't matter just the end results.


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