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Question 20.10: Calculating the Cell emf from Free-Energy Change Suppose the...

Calculating the Cell emf from Free-Energy Change 

Suppose the reaction of zinc metal and chlorine gas is utilized in a voltaic cell in which zinc ions and chloride ions are formed in aqueous solution.

\mathrm{Zn}(s)+\mathrm{Cl}_{2}(g) \stackrel{\mathrm{H}_{2} \mathrm{O}}{\longrightarrow} \mathrm{Zn}^{2+}(a q)+2 \mathrm{Cl}^{-}(a q)

Calculate the standard emf for this cell at 25^{\circ} \mathrm{C} from standard free energies of formation (see Appendix C).


Calculate \Delta G^{\circ} and substitute it and the value of n into the equation \Delta G^{\circ}= -n F E_{\text {cell. }}^{\circ} Solve for E_{\text {cell. }}^{\circ}

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