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The sign of the change in Gibb's Free Energy

Posted: Sun Feb 04, 2018 5:12 pm
by John Huang 1G
Why is it that when the change in Gibb's Free Energy is negative, the process is considered thermodynamically favorable?

Re: The sign of the change in Gibb's Free Energy

Posted: Sun Feb 04, 2018 5:15 pm
by Jessica Jones 2B
This is because a negative G, corresponds to the reaction being spontaneous, and therefore favorable.

Re: The sign of the change in Gibb's Free Energy

Posted: Sun Feb 04, 2018 5:36 pm
by Rachel Brown 3A
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.

Re: The sign of the change in Gibb's Free Energy

Posted: Sun Feb 04, 2018 5:56 pm
by Christina Bedrosian 1B
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)

Re: The sign of the change in Gibb's Free Energy

Posted: Sun Feb 04, 2018 6:07 pm
by Amy Zheng 2l
Negative=spontaneous=no energy need to be added to do work

Re: The sign of the change in Gibb's Free Energy

Posted: Mon Feb 05, 2018 4:06 pm
by Veronica Rasmusen 2B
When deltaG is negative it means the reaction is spontaneous, so it occurs easily and without work

Re: The sign of the change in Gibb's Free Energy

Posted: Mon Feb 05, 2018 10:04 pm
by Nicole Anisgard Parra 2H
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.