Educational website for students

Home Top Ad

Responsive Ads Here

Chemical reactions can be used to produce electrical energy, conversely, electrical energy can be used to carry out chemical reactio...

Electrochemistry



Chemical reactions can be used to produce electrical energy, conversely, electrical energy can be used to carry out chemical reactions that do not proceed spontaneously.

In Electrochemistry we study the production of electricity from the energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations.

Electrochemical Cell: In a spontaneous chemical process, which can take place on its own, the Gibb’s energy of the system decreases. It is this energy that gets converted to electrical energy. The reverse process is also possible in which we can make non-spontaneous processes occur by supplying external energy in the form of electrical energy. These inter conversions are carried out in 
equipment called Electrochemical Cells.

Electrochemical cells are of two types:

1. Galvanic Cells: A galvanic cell is used to convert chemical energy into electrical energy.
2. Electrolytic Cells: A Electrolytic Cell is used to convert electrical energy into chemical energy. 

We all have studied in previous c
lasses also about the daniel cell, this cell converts the chemical energy released during the redox reaction of zinc(Zn) and copper(Cu) to electrical energy and has the electrical potential of 1.1V when the concentration of Zn2+ and Cu2+ ions are unity.  This cell is also called galvanic or a voltaic cell.






0 coments: