\(\Delta G\) is negative, if \(E _{\text {cell }}\) is positive

Anode : \(\quad Cu ( s ) \longrightarrow Cu ^{-2}\left( C _{1}\right)+2 e ^{-}: E ^{\circ}\)

\(\frac{\text { Cathode }: Cu ^{+2}\left( C _{2}\right)+2 e ^{-} \longrightarrow Cu ( S ):- E ^{\circ}}{\text { Cell reaction }: Cu ^{+2}\left( C _{2}\right) \longrightarrow Cu ^{+2}\left( C _{1}\right) E _{\text {cell }}^{\circ}=0}\)

\(E _{\text {cell }}= E _{\text {cell }}^{\circ}-\frac{2.303 RT }{ nF } \log Q\)

\(E _{\text {cell }}=0-\frac{2.303 RT }{ nF } \log \left(\frac{ C _{1}}{ C _{2}}\right)\)

\(E _{\text {cell }}>0:\) if \(\frac{ C _{1}}{ C _{2}}<1 \Rightarrow C _{1}< C _{2}\)