Efficiency of the following cells is 84%. A(.s.)+B2 +(.aq.)leftharpoons A2 +(.aq.)+B(.s.) ; Δ H=-285 kJ Then the standard electrode potential of the cell will be

Question

Efficiency of the following cells is 84%. A(.s.)+B2 +(.aq.)leftharpoons A2 +(.aq.)+B(.s.) ; Δ H=-285 kJ Then the standard electrode potential of the cell will be (A) 1.20 V (B) 2.40 V (C) 1.10 V (D) 1.24 V

Tardigrade Admin · Accepted Answer

Efficiency =(Δ G ° /Δ H ° )=(- n F E ° /Δ H ° ) 0.84=(- 2 × E ° × 96500/- 285 × 1000) E° =+1.24V .

Q. Efficiency of the following cells is 84%.

$A (s) + B^{2 +} (a q) ⇌ A^{2 +} (a q) + B (s)$ ; $Δ H = - 285$ kJ

Then the standard electrode potential of the cell will be

1.20 V

2.40 V

1.10 V

1.24 V

Efficiency $= \frac{Δ G ^{\circ}}{Δ H ^{\circ}} = \frac{- n F E ^{\circ}}{Δ H ^{\circ}}$

$0.84 = \frac{- 2 \times E ^{\circ} \times 96500}{- 285 \times 1000}$

$E^{\circ} = + 1.24 V$ .

Q. Efficiency of the following cells is 84%. A(s)+B2+(aq)⇌A2+(aq)+B(s) ; ΔH=−285 kJ Then the standard electrode potential of the cell will be