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Capítulo 18

Eletroquímica

Equilíbrio de Reações Redox
Equilíbrio de Reações Redox
Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or ...
Força Eletromotriz
Força Eletromotriz
Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical ...
Células Voltaicas/Galvânicas
Células Voltaicas/Galvânicas
Spontaneous Chemical Reactions Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering ...
Potenciais Padrão de Eletrodos
Potenciais Padrão de Eletrodos
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox ...
Potencial Celular e Energia Livre
Potencial Celular e Energia Livre
Thermodynamics of a Redox Reaction Thermodynamics is the branch of physics dealing with the relationship between heat and other forms of energy. In an ...
A Equação de Nernst
A Equação de Nernst
Nonstandard Reaction Conditions The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy ...
Células de Concentração
Células de Concentração
A concentration cell is a type of a  voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and ...
Baterias e Células de Combustível
Baterias e Células de Combustível
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to ...
Corrosão
Corrosão
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green ...
Eletrólise
Eletrólise
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are ...
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