Lead-Acid Battery Discharge

Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O

अवलोकन

During discharge, lead is oxidized to PbSO₄ at the anode while PbO₂ is reduced to PbSO₄ at the cathode, consuming sulfuric acid and producing water. The cell voltage is about 2.1 V, and six cells in series give the standard 12.6 V car battery. Invented by Gaston Planté in 1859, it remains the world's most recycled product.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Lead Pb 1 (s)
अभिकारक Sulfuric Acid H₂SO₄ 2 (aq)
उत्पाद Water H₂O 2 (l)

रोजमर्रा का उदाहरण

The 12V battery that starts your car every morning uses this exact lead-acid chemistry, invented over 160 years ago.

औद्योगिक महत्व

Lead-acid batteries represent a $45 billion global market. They are 99% recyclable and dominate automotive starting, UPS, and telecom backup.

गुण

प्रकार
Electrochemical
प्रतिवर्ती
हाँ
ऊर्जा
ऊष्माक्षेपी
ΔH
-359.0 kJ/mol

संबंधित अभिक्रियाएँ

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Electrochemical CO₂ Reduction to CO

Frequently Asked Questions

What is the equation for Lead-Acid Battery Discharge?
The balanced equation is: Pb + PbO₂ + 2H₂SO₄ → 2PbSO₄ + 2H₂O.
What type of reaction is Lead-Acid Battery Discharge?
Lead-Acid Battery Discharge is a electrochemical reaction. It is reversible under certain conditions.
Is Lead-Acid Battery Discharge exothermic or endothermic?
Lead-Acid Battery Discharge is exothermic (releases energy). The enthalpy change (ΔH) is -359.0 kJ/mol.