The sign of the change in Gibb's Free Energy
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The sign of the change in Gibb's Free Energy
Why is it that when the change in Gibb's Free Energy is negative, the process is considered thermodynamically favorable?
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Re: The sign of the change in Gibb's Free Energy
This is because a negative G, corresponds to the reaction being spontaneous, and therefore favorable.
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Re: The sign of the change in Gibb's Free Energy
To expand, if a reaction is spontaneous, it can occur more easily and often so it would be more favorable than a reaction that requires a specific environment and has a more difficult proceeding.
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Re: The sign of the change in Gibb's Free Energy
when deltaG is negative, that means deltaS of the universe (total) is positive since deltaS(total)=-(deltaG)/T. deltaS being positive means the reaction is spontaneous (thus deltaG needs to be negative)
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Re: The sign of the change in Gibb's Free Energy
Negative=spontaneous=no energy need to be added to do work
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Re: The sign of the change in Gibb's Free Energy
When deltaG is negative it means the reaction is spontaneous, so it occurs easily and without work
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Re: The sign of the change in Gibb's Free Energy
A negative value for Gibb's free energy indicates that no energy is needed to be added to the system to have the reaction occur spontaneously. Therefore, the reaction is spontaneous. If it was a positive value, that indicates that that quantity of energy must be added in order for the reaction to occur spontaneously, and therefore, it is not spontaneous.
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