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Topic: Determine ΔG° Given E Cell  (Read 1659 times)

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Offline Clanouper

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Determine ΔG° Given E Cell
« on: November 04, 2014, 06:07:38 AM »
Use the reduction potentials, the unbalanced half reactions and the unbalanced chemical equation below to find ΔG° in kJ for the reaction:

Reaction    E° (V)
Cu+(aq) + e− → Cu(s)   0.521
Al3+(aq) + e− → Al(s)   -1.662

Cu+(aq) + Al(s) → Cu(s) + Al3+(aq)

E cell was found (marked correct) to be: 2.183 V

My attempt:
ΔG°= -n(F)(Ecell)
ΔG°=-(1)(9.649E4C/mol)(2.138V)
ΔG°= -206295.62 J
ΔG°= -206 kJ/mol


However, this will only give me the answer in kJ/mol. How can I figure out ΔG° in kJ with just the information provided? Any guidance is very appreciated! Thank you.

Offline Borek

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Re: Determine ΔG° Given E Cell
« Reply #1 on: November 04, 2014, 06:21:39 AM »
It most likely asks for energy per so called "mole of reaction" - as correctly balanced.
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