Positive E means Favorable

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305174946
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Joined: Fri Sep 28, 2018 12:17 am

Positive E means Favorable

Postby 305174946 » Fri Feb 22, 2019 2:06 pm

Today Lavelle stated that when the standard reduction potential is positive that the reactant is favorable. Did I understand this wrong? Can someone explain please?

Shally Li 2C
Posts: 30
Joined: Fri Sep 28, 2018 12:22 am

Re: Positive E means Favorable

Postby Shally Li 2C » Fri Feb 22, 2019 4:37 pm

In the textbook it says that when the standard potential is positive, the reduction half-reaction has a greater electron-pulling power, so the tendency for the half-reaction to occur is stronger, which is what I think he meant by the reactants are favored.

JT Wechsler 2B
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

Re: Positive E means Favorable

Postby JT Wechsler 2B » Fri Feb 22, 2019 6:02 pm

Yes, you heard Lavelle correctly. Basically, when E is positive, the equation, deltaG = -nFE is negative. When deltaG is negative, the reaction is spontaneous.


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