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Problem: Two primary batteries are based on the cell reactions as follows: 2 MnO2 + Zn...

Problem: Two primary batteries are based on the cell reactions as follows:

2 MnO2 + Zn + 2NH4Cl -> Mn2O3 + Zn(NH3)2Cl2 + H2O

and

2Li + 2SO2 -> Li2S2O4

that have free energies of -229 Kj/mol of Zn and -294 Kj/mol of Li, respectively. Typical batteries have a capacity of 2 Ah (ampere hours). Estimate the battery voltages and the weights of the two metals needed to deliver this capacity. Do your calculations reveal any advantages for Li battery? (Atomic weights of Zn and Li are 65 and 7, respectively.)

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Expert Solution

queen_honey_blossom answered 2 years ago
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