\(\underset{\text{Silver amalgam}}{\mathop{Ag\,-\,Hg\,}}\,\xrightarrow[\Delta ]{Fe\,\,vessel}\,Ag\,\,+Hg\,\uparrow \)
Vessel made of other metal will form amalgam with liberated mercury.
$Zn = Z{n^{2 + }} + 2{e^ - };\,\,{E^o} = + 0.76\,V$
$Fe = F{e^{2 + }} + 2{e^ - };\,\,{E^o} = + 0.41\,V$
નીચેના કોષ પ્રક્રિયા માટે $EMF$ ......... $\mathrm{V}$ છે
$F{e^{2 + }} + Zn\, \to \,Z{n^{2 + }} + Fe$
$Zn ^{2+}+2 e ^{-} \rightarrow Zn ; E ^{\circ}=-0.760 \,V$
$Ag _{2} O + H _{2} O +2 e ^{-} \rightarrow 2 Ag +2 OH ^{-} ; E ^{\circ}=0.344 \,V$
જો $F$ $96,500 C mol ^{-1}$ હોય, તો કોષનો $\Delta G ^{\circ}$ શોધો. ($kJ mol ^{-1}$ માં)