Lead-Acid Battery Discharge
Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O
Обзор
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.
Участники
| Роль | Вещество | Коэффициент | Состояние |
|---|---|---|---|
| Реагент | Lead Pb | 1 | (s) |
| Реагент | Sulfuric Acid H₂SO₄ | 2 | (aq) |
| Продукт | Water H₂O | 2 | (l) |
Пример из жизни
The 12V battery that starts your car every morning uses this exact lead-acid chemistry, invented over 160 years ago.
Промышленное значение
Lead-acid batteries represent a $45 billion global market. They are 99% recyclable and dominate automotive starting, UPS, and telecom backup.
Свойства
- Тип
- Electrochemical
- Обратимая
- Да
- Энергия
- Экзотермическая
- ΔH
- -359,0 kJ/mol
Связанные реакции
Electrorefining of Copper
Alkaline Battery Discharge
Anodizing of Aluminum
Chlor-Alkali Electrolysis
Nickel-Metal Hydride Battery
Daniell Cell (Zinc-Copper Galvanic Cell)
Electrolysis of Molten NaCl (Downs Process)
Hall-Héroult Process (Aluminum Smelting)
Electrowinning of Zinc
Electrolysis of Water
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.