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Unit6 week2 lecture5part1 fuelcells

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Unformatted text preview: |Zn2+(aq)||Cu2+(aq)|Cu(s) PracGce wriGng cell reacGons •  Write the diagram for a cell with a hydrogen electrode on the leh and an iron(III)‐iron(II) electrode on the right. The two electrode compartments are connected by a salt bridge. PracGce wriGng cell reacGons, cont. •  Write the diagram for a cell that has an electrode consisGng of a manganese wire dipping into a soluGon of manganese (II) ions on the leh, a salt bridge, and a copper(II)‐copper(I) electrode on the right with a plaGnum wire. Energy from Electron Transfer Why do baleries look so different? Unit 6 Week 2 Lecture 4 Transferring chemical potenGal to electrical energy with creaGve design yields different galvanic cells for different applicaGons Diagram of “dry” cell, similar to Ever‐ready balery or Duracell Lead‐Acid balery •  6 cells 2 volts each, total 12 volts •  Pb(s) + PbO2(s) + H2SO4 2PbSO4(s) + 2H2O(l) Hybrid Cars use NiMH baleries Toyota Prius Gas Engine and Electric Motor Energy from Electron Transfer What is a fuel cell? Unit 6 Week 2 Lecture 5‐Part 1 Fuel Cells •  Galvanic cell that produces electricity by converGng chemical energy of a fuel without burning the fuel. SomeGmes called “flow”baleries. •  Most common fuel is hydrogen. Hydrogen Fuel Cell an...
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