Calculate standard free energy change for the reaction 12Cu(s)+12Cl2(g)⇌1

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Question

Calculate standard free energy change for the reaction

\frac{1}{2} C u (s) + \frac{1}{2} C l_{2} (g) ⇌ \frac{1}{2} C u^{2 +} + C l^{-}

taking place at in a cell whose standard e.m.f. is

1.02 v o l t s

Options:

A . - 98430 J

B . 98430 J

C . 96500 J

D . - 49215 J

Answer: Option A
:
A

Δ G = - n F E^{\circ}

\Rightarrow Δ G = - 1 \times 96500 \times 1.02 \Rightarrow Δ G = - 98430

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