E cell

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Matthew Casillas 1C
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Joined: Fri Sep 28, 2018 12:21 am

E cell

Postby Matthew Casillas 1C » Sun Mar 17, 2019 9:32 am

I know for galvanic cells, the E cell can't be negative, but can it be negative for voltaic cells?

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Joined: Fri Sep 28, 2018 12:24 am

Re: E cell

Postby Henry_Phan_4L » Sun Mar 17, 2019 9:37 am

Voltage usually isn't negative.

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Joined: Fri Sep 28, 2018 12:27 am

Re: E cell

Postby maldonadojs » Sun Mar 17, 2019 9:47 am

it is not usually negative, but in some instances, we have allowed it to be negative. i think when you are not trying to make the most spontaneous and just solving for E, you should follow cathode-anode and hope it does us justice. I was also confused.

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Re: E cell

Postby lukezhang2C » Sun Mar 17, 2019 3:01 pm

It's not usually negative in the way that time can't be negative in a physics problem, but for the sake of some calculations we can set it to be negative. When flipping the equation for a half reaction your E can be negative at times, which may contribute to this as well.

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