Voltage vs Gibbs

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Voltage vs Gibbs

Postby 305385703 » Sun Mar 01, 2020 11:33 pm

Why is voltage positive when the reaction is spontaneous while the gibbs free energy is negative?

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Re: Voltage vs Gibbs

Postby PranaviKolla2B » Sun Mar 01, 2020 11:34 pm

Is voltage negative when the gibbs free energy is positive?

Philomena 4F
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Re: Voltage vs Gibbs

Postby Philomena 4F » Sun Mar 01, 2020 11:48 pm

A negative Gibbs free energy means a spontaneous reaction. From the eq deltaG= -nFE, a positive E will still result to a negative value. If it's a negative E, then deltaG would be positive since the negative sign in front of n will be cancelled out and turn to a positive sign. That in turn will be a non spontaneous reaction.

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