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State Function

Posted: Sun Feb 09, 2020 8:16 pm
by Erik Buetow 1F
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?

Re: State Function

Posted: Sun Feb 09, 2020 8:19 pm
by Kaylee Sepulveda 4G
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.

Re: State Function

Posted: Sun Feb 09, 2020 8:21 pm
by JohnWalkiewicz2J
Yeah pretty much, since ΔG= ΔH - TΔS and all those components are state functions, you could assume ΔG is also a state function.

Re: State Function

Posted: Sun Feb 09, 2020 8:24 pm
by Cavalli_1H
hess's law can also be applicable to gibbs free energy for the reason of it being a state property

Re: State Function

Posted: Sun Feb 09, 2020 8:25 pm
by Mariana Fuentes 1L
You can use it. You just have to make sure you arrange the equations to be equal to delta G.

Re: State Function

Posted: Sun Feb 09, 2020 8:51 pm
by DesireBrown1J
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?

Re: State Function

Posted: Mon Feb 10, 2020 12:25 pm
by Megan Vu 1J
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.

Re: State Function

Posted: Mon Feb 10, 2020 1:27 pm
by JesseAuLec1Dis1G
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.