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The efficiency of a fuel cell si 80% and...

The efficiency of a fuel cell si `80%` and the standard heat of reaction is `-300kJ`. The reaction involves two electrons in redox change. `E^(c-)` for the cell is

A

`1.24V`

B

`2.48V`

C

`0V`

D

`0.62V`

Text Solution

Verified by Experts

The correct Answer is:
a
Efficiency `=(DeltaG^(c-))/(DeltaH^(c-))=-(nE^(c-)F)/(DeltaH)=80`
`E^(c-)=(80xx(-300)xx10^(3))/(2xx96500xx100)=1.24V`
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