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Question

The cell potential (Ecell) of a reaction is related as ΔG=nF Ecell, where ΔG represents maximum useful electrical work.
n = no. of moles of electrons exchanged during the reaction.
For reversible cell reaction d(ΔG)=(ΔV)dp(ΔS)dT
At const. P, d(ΔG)=(ΔS)dT
At const. P, ΔG=ΔHTΔS ..(1)
ΔG=ΔH+T(d(ΔG)ΔT)P. (2)
(dEcelldT)p is known as temperature coefficient of the emf of the cell.

The ΔS for the cell reaction Zn+2AgClZnCl2+2Ag is

A
73.53JK1mol1
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B
83.53JK1mol1
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C
100JK1mol1
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D
200JK1mol1
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Solution

The correct option is A 73.53JK1mol1
ΔS=nF(dEdT)
2×96500(3.81×104)
=73.53j/mole k

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