Homework Help: Chemistry

Posted by Ethan on Sunday, April 15, 2012 at 3:06pm.

Consider the voltaic cell
Zn(s) + Cu{2+}(aq)--> Zn{2+}(aq)+Cu(s)
{}=charge
Under standard conditions, what is the maximum electrical work, in Joules that can accomplish if 60 g of copper is plated out?

Chemistry - SSS, Sunday, June 10, 2012 at 4:13am
G = -nFE = J/mol

Zn(s)-->Zn^2+(aq)+2e^- 0.765 V
Cu^2+(aq)+2e^- -->Cu(s) 0.337 V

n = 2, F = 96,485, E =(0.765+0.337) = 1.102

G = -212652.94 J/mol

60g Cu * 1 mol Cu/63.546g Cu = 0.944 mol

Max. work = -212652.94 J/mol * 0.944 mol
= -200786

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