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Consider Delta G^(@) for the following c...

Consider `Delta G^(@)` for the following cell reaction :
`Zn (s) + Ag_(2)O(s)+H_(2)O(l) hArr Zn^(2+)(aq)+2Ag(s)+2OH^(-)(aq)`
`E_(Ag^(+)//Ag)^(@) = +0.80` and `E_(Zn^(2+)//Zn)^(@) = - 0.76 V`

A

`2.13xx10^(5) J "mol"^(-1)`

B

`-2.13xx10^(5) J "mol"^(-1)`

C

`1.06xx10^(5) J "mol"^(-1)`

D

`-1.06xx10^(5) J "mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`E_("cell")^(@)=E_(Ag2O//Ag)^(@)-E_(Zn^(2+)//Zn)^(@)`
`=0.344-(-0.76)=1.104 V`
`DeltaG_(0)=-nFE_("cell")^(0)=-2xx96500 xx 1.104`
`=-2.13xx10^(5) J "mol"^(-1)`
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