Galvanic Cell emf

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005206171
Posts: 107
Joined: Wed Sep 18, 2019 12:20 am

Galvanic Cell emf

Postby 005206171 » Sun Feb 23, 2020 12:56 am

What’s happening in the Galvanic Cell when emf is negative and the cell is absorbing energy (Delta G >0)? Whats happening when the cell is absorbing energy?

Sahil Jog 1F
Posts: 126
Joined: Thu Jul 11, 2019 12:16 am

Re: Galvanic Cell emf

Postby Sahil Jog 1F » Sun Feb 23, 2020 10:04 am

When emf is negative, the cell does not "absorb energy". All this means is that the reaction would be unfavorable and thus non-spontaneous. Hope this helps.

Anika Chakrabarti 1A
Posts: 102
Joined: Sat Aug 24, 2019 12:17 am

Re: Galvanic Cell emf

Postby Anika Chakrabarti 1A » Sun Feb 23, 2020 11:13 am

If G is positive for a galvanic cell, the redox reaction is unfavorable, and therefore electrons would not flow from anode to cathode. In order for a battery to work, G must be negative so that you get a positive voltage and the electron flow from anode to cathode is favorable.

dtolentino1E
Posts: 101
Joined: Thu Jul 11, 2019 12:17 am

Re: Galvanic Cell emf

Postby dtolentino1E » Sun Feb 23, 2020 11:14 am

how would a galvanic cell have a negative emf?


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