Free Energy


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905085650
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am

Free Energy

Postby 905085650 » Sun Feb 17, 2019 11:53 pm

Is free energy a state function? If so how do we add it up? Thank you!!

Jordan Lo 2A
Posts: 85
Joined: Fri Sep 28, 2018 12:25 am

Re: Free Energy

Postby Jordan Lo 2A » Mon Feb 18, 2019 7:38 am

I believe that delta G is a state function because delta G not is a state function

Jordan Lo 2A
Posts: 85
Joined: Fri Sep 28, 2018 12:25 am

Re: Free Energy

Postby Jordan Lo 2A » Mon Feb 18, 2019 7:40 am

You add similar to Hess's Law, with the sum of the products minus the sum of the reactants

Stevin1H
Posts: 89
Joined: Fri Sep 28, 2018 12:17 am

Re: Free Energy

Postby Stevin1H » Thu Feb 21, 2019 10:20 am

Yes, Gibbs free energy is a state function because we can apply Hess's method to find delta G knot. Or another method would be calculating the Delta G knot of the reaction by subtracting the sum of the delta G knot of products by the sum of the delta G knot of the reactants.

Zubair Ahmed 1L
Posts: 81
Joined: Fri Sep 28, 2018 12:16 am

Re: Free Energy

Postby Zubair Ahmed 1L » Thu Feb 21, 2019 11:34 am

Yes, delta G is a state function. We can take a similar Hess's Law approach when trying to calculate the Gibbs free energy of a reaction. Another approach we can take to calculate the change in Gibbs free energy is by subtracting the total Gibbs Free energy of the reactants from the products.

A De Castro 14B 2H
Posts: 75
Joined: Fri Sep 28, 2018 12:29 am

Re: Free Energy

Postby A De Castro 14B 2H » Thu Feb 21, 2019 11:50 am

The change in Gibbs free energy is a state function, i.e. it is additive. Dr. Lavelle showed in lecture that ∆G°rxn = ΣnGf°(products) - ΣnGf°(reactants)


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