Unformatted text preview: ltaic Cell ac<vity Unit 6 Week 1 Lecture 3 Spontaneous e‐ transfer is going to give oﬀ energy as the reacGon proceeds Write the reacGon based on what is going on in the picture: The redox reacGon has been physically separated into two separate beakers, forcing the electron ﬂow through the wire (electrical energy). Electrochemistry‐the study of the interchange of chemical and electrical energy This device in which the half reacGons from a spontaneous redox reacGon have been separated is called voltaic cell or Galvanic cell Nice Flash AnimaGon – should have explored this in Voltaic Cell POGIL acGvity. If you haven’t already please take Gme to explore this animaGon hlp://www.mhhe.com/physsci/chemistry/
essenGalchemistry/ﬂash/galvan5.swf Voltaic or Galvanic Cell‐a device in which chemical energy is changed into electrical energy •
• Electrode – conductors that make contact with contents Anode – site of oxidaGon Cathode – site of reducGon Salt bridge – allows charge balance between cells. • Cell potenGal, E, measure of ability of a cell reacGon to pull electrons through a circuit. (also called electromoGve force, emf). •
• Cell potenGal measured in volts, V. Diﬃcult to measure accurately. Voltaic or Galvanic Cell Zn(s)...
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- Spring '08
- Electron, Electron Transfer