Lead-Acid Battery Discharge
Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O
概要
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.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Lead Pb | 1 | (s) |
| 反応物 | Sulfuric Acid H₂SO₄ | 2 | (aq) |
| 生成物 | Water H₂O | 2 | (l) |
日常の例
The 12V battery that starts your car every morning uses this exact lead-acid chemistry, invented over 160 years ago.
産業上の重要性
鉛蓄電池は450億ドルのグローバル市場を持ち、99%リサイクル可能で自動車の始動・照明・点火システムの主要電源である。UPS、フォークリフト、蓄電池にも広く利用される。
特性
- タイプ
- Electrochemical
- 可逆的
- はい
- エネルギー
- 発熱性
- ΔH
- -359.0 kJ/mol
関連する反応
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.