Compound stability with respect to decomposition






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Sierra Cheslick 2B
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am

Compound stability with respect to decomposition

Postby Sierra Cheslick 2B » Mon Feb 18, 2019 3:30 pm

Why does having a negative deltaG make a compound unstable with respect to decomposition?

Neil Hsu 2A
Posts: 61
Joined: Fri Sep 28, 2018 12:16 am

Re: Compound stability with respect to decomposition

Postby Neil Hsu 2A » Mon Feb 18, 2019 3:39 pm

Looking at a decomposition reaction, let's say A --> B + C, if the reaction has a negative delta G, then the decomposition reaction is spontaneous, or favorable. This means that A has a tendency to decompose into B and C; in other words, we can say that A is unstable.

Albert Duong 4C
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Re: Compound stability with respect to decomposition

Postby Albert Duong 4C » Mon Feb 18, 2019 3:43 pm

I believe because a negative delta g indicates that a reaction is spontaneous (more likely to occur or favorable), and if that compound is unstable it means that its more likely to revert back to its pure elements (hence, decomposition).

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

Re: Compound stability with respect to decomposition

Postby Kelsey Warren 1I » Mon Feb 18, 2019 4:06 pm

If delta G is negative, then the forward reaction is favored, which means that the reactants are unstable and will decompose into the products spontaneously.


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