Question

In a common car battery, six identical cells each carry out the following reaction where two moles of e- are transferred from Pb to Pb⁴⁺:

Pb + PbO₂ + 2HSO₄^– + 2H⁺ → 2PbSO₄ + 2H₂O (E° = 2.04 V)

For such a cell, calculate ΔG° at 25°C

A) (-98 ± 1) kJ

B) (-394 ± 1) kJ

C) (-787 ± 1) kJ

D) (-197 ± 1) kJ

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Calculate E_cell at 298K for a concentration cell made with silver electrodes in silver nitrate solutions. One cell contains 0.25 M Ag⁺ solution and the other a 1.7 M Ag⁺ solution.

A) (8.49 ± 0.02) x 10 ^-1 V

B) (7.51 ± 0.02) x 10 ^-1 V

C) (4.92 ± 0.02) x 10 ^-2 V

D) (-4.92 ± 0.02) x 10 ^-2 V

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Calculate the ΔG° for the dissociation of acetic acid (CH₃COOH) in water at 298 K

A) (-27 ± 0.5) kJ

B) 0.000 kJ

C) (50.0 ± 0.5) kJ

D) (27 ± 0.5) kJ

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