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Calculate the Ecell∘ for each of the following balanced redox reactions.
1) 2Cu(s)+Mn2+(aq)→2Cu+(aq)+Mn(s). Determine whether the reaction is spontaneous as it is written.
2) MnO2(s)+4H+(aq)+Zn(s)→Mn2+(aq)+2H2O(l)+Zn2+(aq). Determine whether the reaction is spontaneous as it is written.
3) Cl2(g)+2F−(aq)→F2(g)+2Cl−(aq). Determine whether the reaction is spontaneous as it is written.

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