CHM135H1 Lecture : Notes taken during lecture
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CHM135H1 Full Course Notes
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25 in the chart, all are reduction half-reactions above the highlighted line, favoured reactions. When e is greater than zero, reaction is spontaneous. Note that li+ is not a reducing agent, it is a poor oxidizing agent. Overall cell potential = 1. 56 v (sum of oxidation and reduction. Final overall reaction is spontaneous the one that must be switched is the more negative one thus the zn is switched, as oxidation half-cell. For given reaction, the lower one will occur more readily potentials) n = number of moles electrons transferred in reaction. Change: f is per mol of electrons. Units cancel so left with only joules. Same thing for standard free energy (the equation with the degree sign) Ecell = 0. 15 v [cu half-reaction] + 0. 14 v [sn switched] No need to worry about multiplying by mole ratio because intensive. Expect answer to be negative because spontaneous reaction. Delta g = -(2mol)(96500c/mol e)(0. 29v) = -56kj.
