6th edition, 14.33

Moderators: Chem_Mod, Chem_Admin

Hai-Lin Yeh 1J
Posts: 89
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 1 time

6th edition, 14.33

Postby Hai-Lin Yeh 1J » Thu Feb 28, 2019 4:39 pm

a) The standard Gibbs free energy of formation of Tl3+(aq) is +215 kJ.mol-1 at 25C. Calculate the standard potential of the Tl3+/Tl couple. (b) Will Tl+ disproportionate in aqueous solution

Can someone explain how a redox couple works and for b) I found delta G in the end, but how does delta G for Tl+ being very large and positive answer whether Tl+ will disproportionate in aqueous solution? Does it mean if it is positive, therefore, not spontaneous and not favoring the forward reaction, mean Tl+ will NOT disproportionate in aqueous solution?

Posts: 19138
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 820 times

Re: 6th edition, 14.33

Postby Chem_Mod » Thu Feb 28, 2019 6:41 pm

The redox couple just refers to a transfer of electrons between the two species in that couple. The idea here is to find the delta G for the disproportionate reaction to determine whether this reaction is spontaneous or not. If it's spontaneous, it will proceed. If not spontaneous, then it will not proceed.

Return to “Work, Gibbs Free Energy, Cell (Redox) Potentials”

Who is online

Users browsing this forum: No registered users and 1 guest