If gibbs free energy of formation for water is negative, why is the formation of water not spontaneous?






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William Weng 2L
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Joined: Tue Oct 04, 2016 3:01 am

If gibbs free energy of formation for water is negative, why is the formation of water not spontaneous?

Postby William Weng 2L » Wed Feb 15, 2017 11:56 am

Delta G of formation of water is -237 kJ/mol, so why doesn't H2 and O2 form water in room temperature?

Justin_Yi_1J
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Re: If gibbs free energy of formation for water is negative, why is the formation of water not spontaneous?

Postby Justin_Yi_1J » Wed Feb 15, 2017 8:57 pm

It has to do with the kenetics of the reaction. Lavelle said in lecture the first day of kenetics the example of the diamonds turning to graphite. The reaction has a negative Gibbs Free energy, but it never occurs in real life.

H2 and O2 to H2O is a similar case.

Nicholas Appel 1F
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Joined: Wed Sep 21, 2016 2:59 pm

Re: If gibbs free energy of formation for water is negative, why is the formation of water not spontaneous?

Postby Nicholas Appel 1F » Wed Feb 15, 2017 10:55 pm

Thank you! Been struggling with this all month!


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