11.3 Cell Potential, Electrical Work, and Free Energy
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Electrolysis of several aqueous solutions is carried out using a 9-V battery and pencil leads as electrodes. Because only the electrodes are shown in the videos, it is important to show these still images
or describe how the reactions were performed if students are to make sense of the videos. In each case the anode is on the left and a 9-V battery has been connected to the lead of each of the pencils near the eraser end with an alligator clip.
The Lead-Acid Battery: Its Voltage in Theory and in PracticeRichard S. Treptow Lead-acid battery fundamentals, cell voltage and the Nernst equation, and an analysis of actual battery performance. Treptow, Richard S. J. Chem. Educ.2002, 79, 334.
Electrochemistry |
Oxidation / Reduction |
Thermodynamics |
Electrolytic / Galvanic Cells / Potentials |
Acids / Bases |
Applications of Chemistry
Understanding Electrochemical Thermodynamics through Entropy AnalysisThomas H. Bindel This discovery-based activity involves entropy analysis of galvanic cells. The intent of the activity is for students to discover the fundamentals of electrochemical cells through a combination of entropy analysis, exploration, and guided discovery. Bindel, Thomas H. J. Chem. Educ.2000, 77, 1031.
Coulomb's LawEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Electrochemistry
Potential EnergyEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Electrochemistry
Electron Density and Potential EnergyEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.