Stable vs Unstable

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Tinisha 1G
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Joined: Fri Sep 28, 2018 12:17 am

Stable vs Unstable

Postby Tinisha 1G » Thu Feb 21, 2019 12:20 am

Can someone explain the concept of stable and unstable in terms of the Gibbs free energy? Why does a negative free energy mean that its stable?

Posts: 33
Joined: Fri Jan 11, 2019 12:16 am

Re: Stable vs Unstable

Postby Celio_G_Dis2C » Thu Feb 21, 2019 1:26 am

I think stability is based on the use of energy. The universe favors disorder as we've learned from entropy therefore the larger the entropy the more negative our Gibbs free energy gets. That's why if our Gibbs free energy is negative it's stable because its spontaneous meaning that the universe prefers it that way because no energy has to be inputed into it

Celine Cheng 1H
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Re: Stable vs Unstable

Postby Celine Cheng 1H » Thu Feb 21, 2019 2:00 am

One way you could interpret/imagine it is like Gibbs free energy represents the 'energy' of a system. The less energy, the more stable. So, if the change in Gibbs free energy (delta G) is negative, the system is losing energy and therefore becoming more stable (and the surroundings/universe gains that energy and is becoming more unstable ((universe tends towards disorder)) )

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