The efficiency of fuel cell is given by the expression, η is

Question

The efficiency of fuel cell is given by the expression, η is (A) η=-( nF E text cell /Δ H ) × 100 (B) η=-(n F E text cell /Δ S) × 100 (C) η=-( nFE text cell /Δ A ) × 100 (D) None of the above

Tardigrade Admin · Accepted Answer

Efficiency of fuel cell is η=-( nFE text cell /Δ H ) × 100. The thermodynamic efficiency of the fuel cell is the ratio of the electrical free energy to the enthalpy change of the reaction. η=(Δ G /Δ H ) × 100 Also, Δ G =- nFE text cell

Q. The efficiency of fuel cell is given by the expression, $η$ is

$η = - \frac{n F E _{cell}}{Δ H} \times 100$

$η = - \frac{n F E _{cell}}{Δ S} \times 100$

$η = - \frac{n F E _{cell}}{Δ A} \times 100$

None of the above

Efficiency of fuel cell is $η = - \frac{n F E _{cell}}{Δ H} \times 100$ .
The thermodynamic efficiency of the fuel cell is the ratio of the electrical free energy to the enthalpy change of the reaction.
$η = \frac{Δ G}{Δ H} \times 100$
Also, $Δ G = - n F E_{cell}$

Q. The efficiency of fuel cell is given by the expression, η is

η=−ΔHnFEcell ​​×100

η=−ΔSnFEcell ​​×100

η=−ΔAnFEcell ​​×100