# From solution 007 100 points a galvanic cell converts

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from solution. 007 10.0 points A GALVANIC cell converts 1. chemical potential energy into electrical potential energy. correct 2. electrical potential energy into electrical potential energy. 3. chemical potential energy into chemical potential energy. 4. electrical potential energy into chemical potential energy. Explanation: Definition 008 10.0 points Why can the lead-acid batteries used in cars generate electricity for several years before running down ( i.e. , the battery is dead)? 1. The mechanical motion of the engine drives an alternator that generates electric-
swarts (kgs439) – Homework 5 – sutcli ff e – (51615) 3 ity to recharge the battery. correct 2. These batteries are used only to generate the electricity that makes the first spark plug “spark.” Therefore, they are hardly used at all when a car is started, and never when it is driven. 3. The electrons they generate and not the chemical components provide most all of the electricity. 4. A lead-acid battery is so large that it holds large quantities of the chemicals whose electrochemical interaction creates the elec- tricity. Explanation: Lead-acid batteries are secondary cells. The battery is used when a car is started, which is why it recharges via the alternator when you drive, but it is also sometimes used when your A/C compressor cycles. 009 10.0 points The anodic reaction during the charging of a lead battery is 1. PbSO 4 + 2 H 2 O PbO 2 + 4 H + + SO 2 - 4 + 2 e - correct 2. PbO 2 + 4 H + + SO 2 - 4 + 2 e - PbSO 4 + 2 H 2 O 3. Pb + 2 OH - Pb(OH) 2 + 2 e - 4. Pb + SO 2 - 4 PbSO 4 + 2 e - 5. PbSO 4 Pb 2+ + SO 2 - 4 + 2 e - Explanation: 010 10.0 points