Gibbs free energy and balancing redox reactions


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Hannah_1G
Posts: 100
Joined: Wed Sep 18, 2019 12:22 am

Gibbs free energy and balancing redox reactions

Postby Hannah_1G » Thu Mar 05, 2020 2:32 am

Should we check and balance each redox half reaction before trying to calculate gibbs free energy? For example 6L.1: 2 Ce4+ (aq) + 3 I- (aq) 2Ce3+ (aq) + I3- (aq), E cell ° = +1.08 V. Before calculating gibbs, would I need to balance the reaction?

asannajust_1J
Posts: 105
Joined: Wed Sep 11, 2019 12:16 am
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Re: Gibbs free energy and balancing redox reactions

Postby asannajust_1J » Thu Mar 05, 2020 9:16 am

Yes, you must balance each half reaction to determine n, the number of electrons transferred in the reaction.

Veronica_Lubera_2A
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Re: Gibbs free energy and balancing redox reactions

Postby Veronica_Lubera_2A » Thu Mar 05, 2020 9:28 am

Yes so you would find the half reactions and balance them to find the least common multiple of their transferred electrons in the final equation. (Usually it's 1 or 2 in the electrons transferred.)


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