The world needs a new source of energy, an unspillable source.

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  1. In the first, you use an outside electric current (say from a battery or a generator) to run a chemical reaction in the desired direction (making aluminum metal, for example, in the Hall process).

    In the second, you allow a chemical reaction to run in a spontaneous fashion. It generates electricity, which you then use to power an electric motor, light a light bulb, etc.

  2. In electrolytic cells ,direct electric current is fed to the cathodes and anodes of the cell to dissociate the compound soluble in the liquid state,eg, hydrolysis of water to H2 & O2 or manufacture of NaOH from brine solution ,or refining of Copper etc.
    In electro chemical cell, electric current is produced by the internal chemical reaction and is used externally eg, electric cells for lights, watches,mobiles etc.

differentiate between electrolytic cell and electrochemical cell?