Thermodynamic Stability


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Katelyn Pham 4E
Posts: 30
Joined: Fri Sep 28, 2018 12:21 am

Thermodynamic Stability

Postby Katelyn Pham 4E » Wed Feb 27, 2019 4:13 pm

If a compound is thermodynamically stable does that mean it is also spontaneous?

Sarah_Kang_2K
Posts: 72
Joined: Fri Sep 28, 2018 12:23 am

Re: Thermodynamic Stability

Postby Sarah_Kang_2K » Wed Feb 27, 2019 4:37 pm

According to the textbook, the terms "stable" and "unstable" refer to the thermodynamic tendency of a substance to decompose into its elements.

Furthermore, a thermodynamically stable compound just means a compound that has a negative standard Gibbs free energy of formation.

So in theory, yes, if a compound is thermodynamically stable, it has a tendency to spontaneously decompose into its elements. However, in practice, this may not always be realized because the decomposition process can be very slow.

Kelsey Warren 1I
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: Thermodynamic Stability

Postby Kelsey Warren 1I » Wed Feb 27, 2019 5:09 pm

If you're given a reaction and told that the products are thermodynamically stable, then the forward reaction will be favored. In contrast, if the reactants are thermodynamically stable, then the reverse reaction would be favored. (And vice versa for if you're told the products/reactants are thermodynamically unstable).


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