CHEM 1100 Lecture Notes - Lecture 11: Sulfuric Acid, Lead, Lithium-Ion Battery

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12 Oct 2017
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Burn coal heat h2o turn turbine electricity (chemical) (heat) (mechanical) (electrical) 2 na (s) + cl2 (g) 2 nacl. Change of charge e-"s must be moved!! Ex: 2 na (s) + cl2 (g) 2 nacl. 2 na 2 na+ + 2 e- (loses e-s = oxidation) Cl2 + 2 e- 2 cl- (gains e-"s = reduction) 2 ni3+ + cd 2 ni2+ + cd2+ Each ni loses an e-, so 2+ charge! How to make electricity: separate half rxns, connect w wire, only way for rxn to go: e- run thru wire, electron flow = electrical current. E-"s lost: voltage, ease of anode e- release, ease of cathode e- absorption, units = volts, salt bridge, transfers ions, completes circuit. Relates voltage (v), current (i), and resistance . Measured in amperes (amps, a) or milliamps (ma) Larger cells = greater capacity--they can sustain the flow of e-"s longer since they contain more material.