For hydrogen-oxygen fuel cell, the cell reaction is 2 H 2 ( g ) + O 2 ( g ) ⟶ 2 H 2 O ( ℓ ) If Δ G f ∘ ( H 2 O ) = − 237.2 kJ mol − 1 , then emf of this cell is

Question

For hydrogen-oxygen fuel cell, the cell reaction is 2 H 2 ​ ( g ) + O 2 ​ ( g ) ⟶ 2 H 2 ​ O ( ℓ ) If Δ G f ∘ ​ ( H 2 ​ O ) = − 237.2 kJ mol − 1 , then emf of this cell is

TestHub · Accepted Answer

We know Δ G ∘ = − n F E ∘ ∴ E ∘ ​ = − n F Δ G ∘ ​ = + 2 × 96500 237.2 × 1000 J ​ = 1.23 V [ ∵ n = 2 ] ​

Chemistry - Electrochemistry Question with Solution | TestHub

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