The efficiency of a cell with cell reaction under standard conditions- As - B2- aq - A2- aq - Bs- - H - - 285 kJ is 85- The standard electrode potential for the cell is-

The correct option is D 1.26 V Thermodynamic nbsp;efficiency nbsp;is given by the ratio of the Gibb's function change to the enthalpy change in the ov ...

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Standard XII

Chemistry

Enthalpy

The efficienc...

Question

The efficiency of a cell with cell reaction under standard conditions: $A (s) + B^{2 +} (a q) ⇌ A^{2 +} (a q) + B (s);$ $Δ H = - 285 k J$ is $85 %$ . The standard electrode potential for the cell is:

1.20 V

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2.40 V

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1.10 V

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1.26 V

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Solution

The correct option is D $1.26 V$
Thermodynamic efficiency is given by the ratio of the Gibb's function change to the enthalpy change in the overall cell reaction.
Efficiency $= \frac{- Δ G^{o}}{Δ H^{o}} = \frac{n E^{o} F}{Δ H^{o}} = \frac{85}{100}$
$∴ E^{o} = \frac{85 \times 285 \times 1000}{100 \times 2 \times 96500} = 1.26$

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The efficiency of a cell with cell reaction under standard conditions: A(s)+B2+(aq)⇌A2+(aq)+B(s); ΔH=−285kJ is 85%. The standard electrode potential for the cell is:

The correct option is D 1.26VThermodynamic efficiency is given by the ratio of the Gibb's function change to the enthalpy change in the overall cell reaction.Efficiency =−ΔGoΔHo=nEoFΔHo=85100∴Eo=85×285×1000100×2×96500=1.26

The efficiency of a cell with cell reaction under standard conditions: $A (s) + B^{2 +} (a q) ⇌ A^{2 +} (a q) + B (s);$ $Δ H = - 285 k J$ is $85 %$ . The standard electrode potential for the cell is: