are voltaic cells spontaneous
Electrochemical cells involve the transfer of electrons from one species to another.
Oxidation States
A species cannot gain electrons unless another has lost electrons and vice versa. Oxidation and reduction go hand in hand.
There are two major types of electrochemical cells: voltaic also galled galvanic and electrolytic. Voltaic cells produce electricity by harnessing the energy present in the flowing electrons. These reactions are spontaneous. Electrolytic cells use spontanous energy to drive a redox nonpolarity that normally would not occur because it is nonspontaneous.]
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