Signs of Enaught

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805312064
Posts: 50
Joined: Thu Jul 11, 2019 12:16 am

Signs of Enaught

Postby 805312064 » Fri Mar 06, 2020 8:45 am

What does it mean when Enaught is negative and why is it always positive for a galvanic cell?

Connie Chen 1E
Posts: 51
Joined: Mon Jun 17, 2019 7:24 am

Re: Signs of Enaught

Postby Connie Chen 1E » Fri Mar 06, 2020 10:04 am

A negative standard cell potential means that the reduction of that species is not spontaneous. This means that it is spontaneous when oxidized. Cell potential of a galvanic cell should be positive because this means that the reaction is spontaneous and does not need any external sources for the reaction to proceed.

Amanda Mei 1B
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Joined: Sat Aug 24, 2019 12:16 am

Re: Signs of Enaught

Postby Amanda Mei 1B » Fri Mar 06, 2020 10:27 am

A negative E naught means that the reverse reaction is spontaneous.

Abby Soriano 1J
Posts: 103
Joined: Sat Aug 24, 2019 12:16 am

Re: Signs of Enaught

Postby Abby Soriano 1J » Fri Mar 06, 2020 10:31 am

You can think of a galvanic cell as a battery. When the standard cell potential is negative, the cell's battery is essentially dead and would need an external source of power to keep it running. When it is positive, it doesn't need this source of power since the reaction is spontaneous (which is why a positive cell potential corresponds to a negative delta G.

Rodrigo2J
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Joined: Sat Jul 20, 2019 12:16 am

Re: Signs of Enaught

Postby Rodrigo2J » Fri Mar 06, 2020 10:31 am

If Enaught is negative it means that it is not spontaneous (favorable).

Mariah
Posts: 104
Joined: Fri Aug 02, 2019 12:16 am

Re: Signs of Enaught

Postby Mariah » Fri Mar 06, 2020 11:07 am

805312064 wrote:What does it mean when Enaught is negative and why is it always positive for a galvanic cell?

It tells you the spontaneity of the reaction, Galvanic Cells are always spontaneous making them positive.

ThomasNguyen_Dis1H
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

Re: Signs of Enaught

Postby ThomasNguyen_Dis1H » Fri Mar 06, 2020 12:56 pm

When E naught is negative, it means that the reaction is not favorable. If the E cell is negative, then the cell is electrolytic.

Hope Hyland 2D
Posts: 50
Joined: Wed Feb 20, 2019 12:16 am

Re: Signs of Enaught

Postby Hope Hyland 2D » Fri Mar 06, 2020 9:14 pm

What does electrolytic mean?


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