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CBSE Class 12 · 2013 · Redox Reactions and ElectrochemistryLong Answer

The standard electrode potential (E°) for the Daniell cell is +1.1 V. Calculate ΔG° for the reaction

Zn (s) + C u^{2 +} (aq) ⟶ Z n^{2 +} (aq) + Cu (s)

(1 F = 96500 C mol

^{- 1}

)

Answer: ΔG° ≈ −212.3 kJ mol⁻¹

Solution

Here

n = 2

:

Δ G^{\circ} = - n F E^{\circ} = - 2 \times 96500 \times 1.1

Δ G^{\circ} = - 2.123 \times 1 0^{5} J = - 212.3 kJ mo l^{- 1}

CBSE Class 12 Board · 2013 · Subjective

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