Lead Dioxide and Sulfuric Acid (Lead-Acid Battery Discharge)

PbO2 + Pb + 2H2SO4 → 2PbSO4 + 2H2O

개요

During discharge, lead dioxide (cathode, Pb⁴⁺) is reduced to lead sulfate while lead metal (anode, Pb⁰) is oxidized to lead sulfate. Both electrodes convert to PbSO₄, and the sulfuric acid electrolyte is consumed. The cell potential is 2.05 V. Charging reverses the reaction.

참여 물질

역할 물질 계수 상태
반응물 Lead Pb 1 (s)
반응물 Sulfuric Acid H₂SO₄ 2 (aq)
생성물 Water H₂O 2 (l)

일상 속 예시

Every car battery is a lead-acid battery using this reversible redox reaction. Starting your car draws hundreds of amps from this reaction.

산업적 중요성

납축전지의 양극 반응으로, 자동차, 백업 전원, 산업용 지게차 전지의 전기 에너지 공급에 핵심적입니다. 방전 깊이(DOD) 관리가 전지 수명에 중요합니다.

성질

유형
Redox
가역 반응
예
에너지
발열
ΔH
-359.4 kJ/mol

관련 반응

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Lead Dioxide and Sulfuric Acid (Lead-Acid Battery Discharge)?
The balanced equation is: PbO₂ + Pb + 2H₂SO₄ → 2PbSO₄ + 2H₂O.
What type of reaction is Lead Dioxide and Sulfuric Acid (Lead-Acid Battery Discharge)?
Lead Dioxide and Sulfuric Acid (Lead-Acid Battery Discharge) is a redox reaction. It is reversible under certain conditions.
Is Lead Dioxide and Sulfuric Acid (Lead-Acid Battery Discharge) exothermic or endothermic?
Lead Dioxide and Sulfuric Acid (Lead-Acid Battery Discharge) is exothermic (releases energy). The enthalpy change (ΔH) is -359.4 kJ/mol.