Gibbs energy

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Jane Burgan 1C
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Joined: Fri Sep 28, 2018 12:15 am

Gibbs energy

Postby Jane Burgan 1C » Sun Feb 17, 2019 6:03 pm

In lecture, professor Lavelle plugged in 0 for G in the equation deltaG=deltaH - TdeltaS to figure out at what temperature is G negative. Why does this work?

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Re: Gibbs energy

Postby Schuyler_Howell_4D » Sun Feb 17, 2019 6:34 pm

He used 0 for Gibbs Free energy to find the critical point at which the liquid and gas phase both exist. At this temperature deltaG is zero so, a temperature higher than the critical temp found will be spontaneous because deltaG is negative. A temperature lower will mean a positive deltaG so the reverse reaction is favored.

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