Question

For the reaction taking place in the cell:
Pt(s) | H2(g) | H+ (q) || Ag+(aq) | Ag(s),
Eocell = + 0.5332 V.
The value of ΔfGo is _____kJ mol–1 [in nearest integer]

Answer 1

The correct answer is 51
Pt(s)|H2(g) H+ (aq)||Ag+(aq)|Ag(s)
$\frac{1}{2}H+2+Ag^+→Ag+H^+$
n = 1
EoCell = 0.5332
ΔG° = –nFE° = – 1 × 96500 × 0.5332
= – 51.453 kJ/mole ≃ 51 kJ/mole