Gibbs free energy


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Bryce Ramirez 1J
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Gibbs free energy

Postby Bryce Ramirez 1J » Sat Mar 14, 2020 10:39 pm

Can someone explain the difference between gibbs free energy and standard gibbs free energy?

Ashley Wang 4G
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Joined: Wed Sep 11, 2019 12:16 am

Re: Gibbs free energy

Postby Ashley Wang 4G » Sat Mar 14, 2020 10:43 pm

Gibbs free energy is associated with the given reaction of interest, which could be under any conditions. Standard Gibb's free energy is the Gibb's free energy for the same reaction, but under standard-state conditions, which is 1 bar for gases, 1M for aqueous solutions, and pure solids and liquids.

ASetlur_1G
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Re: Gibbs free energy

Postby ASetlur_1G » Sat Mar 14, 2020 11:48 pm

Standard Gibbs Free Energy is a fixed value for a reaction, but Gibbs Free Energy changes as the reaction progresses.

005206171
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Re: Gibbs free energy

Postby 005206171 » Sun Mar 15, 2020 2:15 am

Standard Gibbs free energy is at constant temp and constant pressure at 1M

gconcha
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Re: Gibbs free energy

Postby gconcha » Sun Mar 15, 2020 4:27 am

Not only is the standard Gibbs Free Energy measured under standard conditions, it's also kind of the best-case-scenario for the reaction: the most that it will potentially put out.

Anything other than that can represent an instantaneous amount, a botched amount, something messing with the experimental conditions, etc.

Shrayes Raman
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Joined: Sat Jul 20, 2019 12:15 am

Re: Gibbs free energy

Postby Shrayes Raman » Sun Mar 15, 2020 8:57 pm

standard gibbs free energy is defined for a given reaction at standard conditions but gibbs free energy is just a general measure of reaction sponteniety.

Aarushi Solanki 4F
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Re: Gibbs free energy

Postby Aarushi Solanki 4F » Sun Mar 15, 2020 9:50 pm

Standard Gibbs Free Energy is defined for given reactions at standard conditions. Gibbs Free Energy is the actual energy available to do work at whichever stage of the reaction its in, and therefore changes as the reaction progresses.

Owen-Koetters-4I
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Re: Gibbs free energy

Postby Owen-Koetters-4I » Mon Mar 16, 2020 8:23 pm

standard Gibbs energy is under standard state conditions

Tauhid Islam- 1H
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Re: Gibbs free energy

Postby Tauhid Islam- 1H » Tue Mar 17, 2020 5:12 am

Gibbs free energy is equal to delta H- T(delta S). Standard gibbs free energy is when things are occurring at a standard state, which is at 25 degrees C and 1 atm.


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