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Consider the half-cell reaction: O2(g) + 4H+ (aq) + 4e- → 2H2O If all the stoichiometric...

Consider the half-cell reaction: O2(g) + 4H+ (aq) + 4e- → 2H2O If all the stoichiometric coefficients are multiplied by a factor of 2, how are the following parameters changed (make sure to justify your answer):

(a) the number of electrons

(b) the reaction quotient

(c) the standard Gibbs free energy (ΔG θ )

(d) the cell potential (E)

(e) the standard cell potential (E θ )

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Answer #1

(a) the number of electrons

(b) the reaction quotient

(c) the standard Gibbs free energy (ΔG0 )

O2(g) + 4H+ (aq) + 4e- → 2H2O         E0 = 1.23v

it is multifly with 2 no change standard cell potential

2O2(g) + 8H+ (aq) + 8e- → 4H2O         E0 = 1.23v

ΔG0 = -nE0cell * F

change in the standard Gibbs free energy.

the number of electrons,the reaction quotient, the standard Gibbs free energy are changes .

         

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