ELECTRO CHEMISTRY l electrolytic cell std 12 lec 1

ELECTRO CHEMISTRY l ELECTRO CHEMICAL CELLS l CHEMISTRY OF CELLS

1. Electrochemistry ( Electrolytic cell ) Std 12 sci ( E ) Chapter-3 – Electrochemistry Lecture – 1 By :- Ms. MAYRI R SOMPURA HJD INSTITUTE KERA-KUTCH

2. Electrochemistry

3. Electro - chemistry ELECTRICAL ENERGY CHEMICAL ENERGY ELECTRICAL ENERGY CHEMICAL ENERGY ELECTROLYTIC CELL ELECTRICAL ENERGY CHEMICAL ENERGY GALVANIC CELL

4. ELECTROLYTIC CELL ELECTRICAL ENERGY CHEMICAL ENERGY ELECTROLYTIC CELL INPUT OUTPUT NON SPONTANEOUS Redox reaction occurs. Change in Δ G = - ve Δ G = Δ H - T Δ S Non spontaneous rxn = Δ G = + ve Spontaneous = Δ G = - ve NOTE

5. ELECTROLYTIC CELL Electrolytic solution :- It is a solution where molecules are bound by an electrovalent bond. Electrovalent bond : - It is also known as IONIC BOND, i.e. a complete transfer of electrons. Eg , NaCl At anode :- ( + ve terminal ) A - → 1e - + A ( Half oxidation ) At cathode :- ( - ve terminal ) C + + 1e - → C ( half reduction ) Overall reaction :- A - → 1e - + A C + + 1e - → C A - + C + → C + A

6. ELECTROLYTIC CELL