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Question

calculate ΔGf of the reaction :
Ag(aq)+Cl(aq)AgCl(s)
Given : ΔGAgCl=109kJmol1
ΔG(Cl)=129kJmol1
ΔG(Ag)=77kJmol1

A
97kJmol1
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B
57kJmol1
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C
57kJmol1
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D
97kJmol1
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Solution

The correct option is A 57kJmol1
Ag(aq)+Cl(aq)AgCl(s)
ΔGf=ΔGAgCl)ΔfGAgCl)ΔfG(Ag)ΔfG(Cl)
=10977(129)=57kJmol1

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