Gibbs free energy

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vpena_1I
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Gibbs free energy

Postby vpena_1I » Wed Feb 19, 2020 9:35 pm

What is the difference between ΔGrxn and ΔG*rxns?

Christine Honda 2I
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Re: Gibbs free energy

Postby Christine Honda 2I » Wed Feb 19, 2020 9:45 pm

G* means that all the substances are in their standard states

vpena_1I
Posts: 109
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Re: Gibbs free energy

Postby vpena_1I » Wed Feb 19, 2020 10:14 pm

So is ΔGrxn used when were trying to find the change in free energy at a different temp and/or when the reaction is not at equilibrium?

Zaynab Hashm 2I
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Re: Gibbs free energy

Postby Zaynab Hashm 2I » Wed Feb 19, 2020 10:45 pm

ΔG denotes conditions that are not at standard state
ΔG° denotes conditions that are at standard state

*standard state: 1 M, 1 atm, and 298 K (= 25°C)

BritneyP- 2c
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Re: Gibbs free energy

Postby BritneyP- 2c » Wed Feb 19, 2020 11:04 pm

Delta G* means that the conditions are at standard state.
Delta G means that the conditions aren't at standard state

505306205
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Re: Gibbs free energy

Postby 505306205 » Wed Feb 19, 2020 11:52 pm

The second one is gibbs free energy measured under standard conditions. This gibbs free energy remains constant throughout the reaction .

Ayushi2011
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Re: Gibbs free energy

Postby Ayushi2011 » Sat Mar 14, 2020 3:57 pm

G* means a substance is in its standard state.

Amy Kumar 1I
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Re: Gibbs free energy

Postby Amy Kumar 1I » Sat Mar 14, 2020 5:07 pm

deltaG* implies the standard conditions of 1 M concentration, 1 atm pressure, and 25 degrees Celsius.

AronCainBayot2K
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Re: Gibbs free energy

Postby AronCainBayot2K » Sat Mar 14, 2020 5:40 pm

G is not at standard state G* is at standard conditions.

Ashley Alvarado 2C
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Re: Gibbs free energy

Postby Ashley Alvarado 2C » Sat Mar 14, 2020 8:14 pm

Delta G* is the Gibbs free energy at standard conditions which are 1M, 25 degrees C, and 1 atm.


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