CHEM 1100 Study Guide - Midterm Guide: Alkaline Battery, Methanol Fuel, Galvanic Cell
Document Summary
Burn coal heat water turn turbine electricity (chemical) (heat) (mechanical) (electrical: battery. Galvanic cell: chemical electrical ex. triple aaa battery contains one cell. Can be both galvanic and electrolytic (rechargeable batteries) Chemistry: making and breaking chemical bonds bonds = e- chemical reactions: some involve sharing e- others involve e- transfer (ions) producing electricity. Cl2(chg: 0) (chg: +1 na+ lost electron) (chg: -1 cl-) gains electron. 2 na (s) + cl2 (g) 2nacl. 2 na 2 na+ + 2 e- electrons not part of sodium atom anymore: reduction (gains electron) Chlorine absorbs electrons cl2 + 2e- 2cl- Like reactants and products cancel (including e-) to get the full rxn ex. 1. **only 2e- cancel taking us back to full reaction equation: Oil rig (oxidation is loss, reduction is gained) 2 ni(+3) + cd 2 ni(+2) + cd(+2: oxidation. Making electricity: separate the half-reactions, connect with wire (e- run through) Sites of reactions: cathode reduction occurs (e- gained, anode.
