1 chemical action definition an electrochemical fuel

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5.1: Chemical Action Definition: “An electrochemical fuel cell consists of two dissimilar metals immersed in an electrolyte.” (Chemically, it is an oxidation/reduction [plating] process) The electrical potential (voltage) created depends on the two metals involved. The speed (in volts x amp/hours) of the reaction depends on the electrolyte/metal plate size/ambient temperature
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5.1: Chemical Action
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5.1: Chemical Action Primary vs Secondary Cells - Definition: “A secondary cell can be recharged while a primary cell cannot .” - Types of Primary Cells: - Zinc-Carbon - Alkaline - Mercury - Lithium - Silver Oxide - Other . . . .
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5.1: Chemical Action Primary vs Secondary Cells - Types of Secondary Cells: - Lead - Acid - Nickel – Cadmium - Lithium Ion
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5.1: Chemical Action Lead-Acid Charging /Discharging: Charging produces hydrogen and oxygen gases
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5.1: Chemical Action Voltages in series: Voltages in series ADD
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5.1: Chemical Action Voltages in parallel: Voltages in parallel = Same Voltage
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5.1: Chemical Action Voltages in series- parallel:
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5.1: Chemical Action Battery Capacity: - Measured in Amp-Hours 100 amps for 1 hour = 100 amp-hours (Ah) 50 amps for 2 hours = 100 amp-hours (Ah) 5 amps for 20 hours = 100 amp-hours (Ah) 1 amp for 100 hours = 100 amp-hours (Ah) Factors Affecting Battery Capacity: - Plate area - Separators used - State of battery: - State of charge - Electrolyte composition - Age
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5.1: Chemical Action For the Exam: - Definition of electrochemical fuel cell - Battery symbol - How primary cell operates - Name four types of primary cells -
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  • Fall '07
  • DOC
  • electrical energy, Michael Faraday, Fuel cell, chemical action

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