Following two half cells form a complete cell which has Δ G °( in kJ ) value 2 H ++1 / 2 O 2+2 e - arrow H 2 O ; E °=+1.23 V Fe 2++2 e - arrow Fe ( s ) E°=-0.44 V

Question

Following two half cells form a complete cell which has Δ G °( in kJ ) value 2 H ++1 / 2 O 2+2 e - arrow H 2 O ; E °=+1.23 V Fe 2++2 e - arrow Fe ( s ) E°=-0.44 V (A) -122 kJ (B) -222 kJ (C) -322 kJ (D) -422 kJ

Tardigrade Admin · Accepted Answer

Δ G0=-n F E0=-2 × 96500 ×[1.23-(-0.44)] J =-322310 J =-322.31 kJ

Q. Following two half cells form a complete cell which has $Δ G^{\circ} ($ in $k J)$ value
$2 H^{+} + 1/2 O_{2} + 2 e^{-} \to H_{2} O; E^{\circ} = + 1.23 V$
$F e^{2 +} + 2 e^{-} \to F e (s)$ $E^{\circ} = - 0.44 V$

-122 kJ

-222 kJ

-322 kJ

-422 kJ

$Δ G^{0} = - n F E^{0} = - 2 \times 96500 \times [1.23 - (- 0.44)] J$

$= - 322310 J = - 322.31 k J$

Q. Following two half cells form a complete cell which has ΔG∘( in kJ) value 2H++1/2O2​+2e−→H2​O;E∘=+1.23V Fe2++2e−→Fe(s) E∘=−0.44V