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Gonçalves, Bruna F.; Botelho, Gabriela; Medeiros, Maria J.; Smith, Michael J. – Journal of Chemical Education, 2019
In the activity described in this communication, the authors present a simple experiment that can be implemented with moderate operational costs and that allows students to acquire the manipulative skills necessary for chromatographic analysis of a familiar fuel that still plays a fundamental role in providing energy for transport of passengers…
Descriptors: Science Experiments, Skill Development, Object Manipulation, Chemistry
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Smith, Michael J.; Fonseca, Antonio M.; Silva, M. Manuela – Journal of Chemical Education, 2009
The assembly and use of a laboratory version of a secondary cell based on the lead-lead oxide system is described. The cell is easy to construct, sufficiently robust for student use, and has a conveniently low practical capacity of about 5 mA h. This modest cell capacity allows cell assembly, electrode formation and discharge characterization…
Descriptors: Science Laboratories, Cytology, Science Instruction, Teaching Methods
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Smith, Michael J.; Vincent, Colin A. – Journal of Chemical Education, 1989
Summarizes the quantitative relationships pertaining to the operation of electrochemical cells. Energy conversion efficiency, cycle efficiency, battery power, and energy/power density of two types of zinc-silver oxide cells are discussed. (YP)
Descriptors: Chemical Reactions, Chemistry, College Science, Electric Batteries
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Smith, Michael J.; Vincent, Colin A. – Journal of Chemical Education, 1989
Uses reversible electrochemical cells near equilibrium to study basic thermodynamic concepts such as maximum work and free energy. Selects sealed, miniature, commercial cells to obtain accurate measurement of enthalpy, entropy, and Gibbs free energy. (MVL)
Descriptors: Chemical Equilibrium, Chemical Reactions, Chemistry, College Science