Calculate G o and K at 25 o C for the galvanic cell reactions in Exercise 21.

Calculate ΔG^o and K at 25^oC for the galvanic cell reactions in Exercise 21.

Reactions in exercise 21. 

a. Cl₂ + 2e^- →  2Cl₂ E°_cell = 1.36 V

Br₂ + 2e^- → 2Br₂ E°_cell = 1.09 V

b. MnO₄^- + 8H⁺ + 5e^-  →  Mn²⁺ + 4H₂O E°_cell = 1.51 V

IO₄^- + 2H⁺ + 2e^-  →  IO₃^- + H₂O E°_cell = 1.60 V

c. H₂O₂ + 2H⁺ + 2e^- →  2H₂O  = +.78 V

O₂ +2H⁺ + 2e^-  →  H₂O₂ E°_cell = 0.68 V

d. Mn²⁺ + 2e^-  →  Mn E°_cell = 21.18 V

Fe³⁺ + 3e2  →  Fe E°_cell = 20.036 V

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Es. cell