InterviewSolution
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InterviewSolution
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(a) What are fuel cells ? Give an example of a fuel cell. (b) Calculate the equilibrium constant `(logK_(c))and Delta_(r)G^(@)` for the following reaction at 298 K. `Cu_((s))+2Ag^(+)""_((aq))hArrCu^(2+)""_((aq))+2Ag(s)` Given `E_(cell)^(@)=0.46V and IF=96500 C mol^(-1).` |
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Answer» `Cu_((s))+2Ag^(+)""_((aq))hArrCu^(2+)""_((aq))+2Ag""_((s))` `E_(cell)^(@)=0.46V, " "1F=96500C mol^(-1)` `DeltaG^(@)=-2nFE_(cell)^(@)impliesn=2` `DeltaG^(@)=-2xx96500xx0.46 implies" "DeltaG^(@)=-88780J//mol` `-DeltaG^(@)=2.303RTlogkimplies" "88780=2.303xx8.314xx298logk_(c)` `logk_(c)=(88780)/(2.303xx8.314xx298)implies" "logk_(c)=15.56` |
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