Gibbs Free Energy -/+

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Gibbs Free Energy -/+

Postby ClaireHW » Sun Feb 04, 2018 12:42 am

Why it is more favorable for Gibbs Free Energy to be negative?
(Claire Woolson Dis 1K)

Nancy Le - 1F
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Re: Gibbs Free Energy -/+

Postby Nancy Le - 1F » Sun Feb 04, 2018 12:54 am

A negative Gibbs Free Energy means that the energy of the products is less than the energy of the reactants. If it were the reverse, an input of energy would be needed, which is not favorable. Therefore, a negative Gibbs free energy is favored because it drives the reaction forward spontaneously.

Michael Cheng 1C
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Re: Gibbs Free Energy -/+

Postby Michael Cheng 1C » Sun Feb 04, 2018 1:27 am

so spontaneous reaction is associated with - Gibbs Free Energy?

Anna Li 2E
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Re: Gibbs Free Energy -/+

Postby Anna Li 2E » Sun Feb 04, 2018 8:31 pm

For Michael Cheng, when Gibbs Free Energy is negative it is associated with a spontaneous reaction. When gibbs is negative, the system is releasing energy (exergonic), and the definition of spontaneous is when a reaction proceeds without any outside force.

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Re: Gibbs Free Energy -/+

Postby Jessica_Singh_1J » Tue Feb 06, 2018 10:02 am

A negative deltaG is favored because then the reaction will proceed spontaneously and exothermically, releasing heat and increasing the entropy of its surroundings. Reactions that increase entropy are usually more favorable than reactions that require energy and do the opposite.

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