Gibbs equation

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Netpheel Wang 4L
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Joined: Fri Sep 28, 2018 12:15 am

Gibbs equation

Postby Netpheel Wang 4L » Tue Feb 19, 2019 11:07 pm

In terms of this new equation, does it mean that deltaH negative no longer implies spontaneous reactions?

Seohyun Park 1L
Posts: 73
Joined: Fri Sep 28, 2018 12:29 am

Re: Gibbs equation

Postby Seohyun Park 1L » Tue Feb 19, 2019 11:50 pm

Delta H negative does not always mean a spontaneous reaction as entropy plays a part. If the entropy of the system decreases and the temperature is high enough, an exothermic reaction could be non spontaneous as the TOTAL entropy (entropy of system + surroundings) is decreasing.

Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

Re: Gibbs equation

Postby marisaimbroane1J » Wed Feb 20, 2019 12:17 am

The spontaneity of a reaction is determined from delta G. Even though a negative delta H is favorable, it does not always mean the reaction will be spontaneous. Any time delta G is negative, the reaction is spontaneous.

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