First slide

Electrochemical cells

Question

An oxidation - reduction reaction in which 3 electrons are transferred has $∆ G °$ of 17.37 kJ mol^-1 as 25°C.
The value of E°_cell (in V) is ________ × 10^-2.
(If = 96,500 C mol^-1)

Moderate

Solution

$∆ G ° = nF E_{cell}^{⊝} (T = 25 ° C) 17.37 {\times_{10}}^{3} = - 3 \times 96500 \times E_{cell}^{⊝} ∴ E_{cell}^{⊝} = - 0.06 V = - 6 \times 10^{- 2} V$

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