CBSE Class 12-science Answered
WHAT IS T5HE DIFFERENCE BETWEEN ELECTROCHEMICAL CELL AND ELECTROLYTIC CELL?WHAT IS THE REASON FOR THE DIFFERENT CHARGES IN ANODE FOR THESE TWO CELLS?
Asked by vishnuraj | 16 May, 2012, 07:24: AM
Expert Answer
The main points of difference between an electrolytic cell and a galvanic cell (electrochemical cell) are:
Difference between an electrolytic cell and a galvanic cell
Electrochemical cell (Galvanic Cell) | Electrolytic cell |
---|---|
A Galvanic cell converts chemical energy into electrical energy. | An electrolytic cell converts electrical energy into chemical energy. |
Here, the redox reaction is spontaneous and is responsible for the production of electrical energy. | The redox reaction is not spontaneous and electrical energy has to be supplied to initiate the reaction. |
The two half-cells are set up in different containers, being connected through the salt bridge or porous partition. | Both the electrodes are placed in a same container in the solution of molten electrolyte. |
Here the anode is negative and cathode is the positive electrode. The reaction at the anode is oxidation and that at the cathode is reduction. | Here, the anode is positive and cathode is the negative electrode. The reaction at the anode is oxidation and that at the cathode is reduction. |
The electrons are supplied by the species getting oxidized. They move from anode to the cathode in the external circuit. | The external battery supplies the electrons. They enter through the cathode and come out through the anode. |
Answered by | 16 May, 2012, 09:03: AM
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