ITIS Majorana Brindisi Chemistry course Voltaic cells Teacher Gioacchino Margarito.
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Transcript of ITIS Majorana Brindisi Chemistry course Voltaic cells Teacher Gioacchino Margarito.
![Page 1: ITIS Majorana Brindisi Chemistry course Voltaic cells Teacher Gioacchino Margarito.](https://reader036.fdocuments.in/reader036/viewer/2022062417/5514a031550346ea6e8b5965/html5/thumbnails/1.jpg)
ITIS Majorana Brindisi
Chemistry course
Voltaic cells
Teacher
Gioacchino Margarito
![Page 2: ITIS Majorana Brindisi Chemistry course Voltaic cells Teacher Gioacchino Margarito.](https://reader036.fdocuments.in/reader036/viewer/2022062417/5514a031550346ea6e8b5965/html5/thumbnails/2.jpg)
Chemistry and Electricity“I have the pleasure of communicating to you, Sir, and through you to the Royal Society, some striking results at which I have arrived in pursuing my experiments on the electricity excited by the simple mutual contact of metals of different sorts...” Alessandro Volta (1801)
Alessandro Volta Luigi Galvani
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What is electrochemistry? Electrochemistry is the study of reactions in which charged particles (ions or electrons) cross the interface between two phases of matter, typically a metallic phase (the electrode) and a conductive solution, or electrolyte. A process of this kind can always be represented as a chemical reaction and is known generally as an electrode process.
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Potential differences at interfaces
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Cell structure and electrode reactions
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Electromotive force
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The Nernst equation
for a cell at 25 °C
a= activity of the reactants and products∆E°= cell electromotive force standard (25°C, 1atm, a=1), whose values are tabulatedn= number of electrons exchanged in the reaction
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Practical applications of voltaic cells
We use a variety of types of voltaic cell in everyday life, such as:
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