Talk:Gnaiger 2018 MiPschool Tromso A2

Answers

1. Convert the molar format of the Gibbs force of reaction, Δ_kF_nO2 [kJ/mol], into the electrical format, Δ_kF_eO2 [V].

1. 1. Which physicochemical constant is required? → The Faraday constant, F = e·N_A = 96,485.33 C/mol
   2. What is the meaning of the symbol z_O2? → Charge number of O₂ = 4
   3. How are the units of electric energy [J] and electric force [V] related? → V = J/C
   4. Express -460 kJ/mol in units of volt [V]. → -460 kJ/mol = -460/(4·e·N_A) [(kJ/mol)/(C/mol)] = -0.00119189 kJ/C = -1.2 J/C = -1.2 V
   5. Why should we do that? → To relate the driving force of electron transfer to the pmf expressed in electrical format, we have to express both forces in identical units, converting either the force of the chemical reaction from the molar to the electrical format, or the pmf from the electrical to the molar format.