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Postby mayapartha_1D » Tue Mar 13, 2018 7:19 pm

Does anyone know whether or not we will need to be able to define the electromotive force (emf) and its use for the final? If we do, could someone please give a definition?


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Postby jillian1k » Tue Mar 13, 2018 9:53 pm

EMF or electromotive force is just the E of the cell, or the cell potential (E). It is the Ecathode minus Eanode. It's the cell's strength in producing electricity via redox reactions. It is never negative because the electrons only flow from anode to cathode. This is due to the fact that electrons only flow to more positive potential, which is what drives the redox reactions. As soon as the cathode and anode have equivalent potentials, electron flow stops and emf is 0.

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