A fuel cell runs on H2 (hydrogen) and air and generates 10 W. If pure O2 (oxygen

Question

A fuel cell runs on H2 (hydrogen) and air and generates 10 W. If pure O2 (oxygen) is used to replace the air, and current and voltage are adjusted so that the fuel cell continues to deliver 10W, the fuel cell would

a) operate at higher current than before O2 (oxygen) introduction

b) operate at lower current than before O2 (oxygen) introduction

c) initially show an increase in cell potential but then it would come back to the original current and cell voltage so that the power output does not change

Justify your answer:

Explanation / Answer

Solution :-

Correct statement is

c) initially show an increase in cell potential but then it would come back to the original current and cell voltage so that the power output does not change

Because it isdepends on the electrochemical reaction and not on the combustion only

therefore the cell potential can icrease initially but it will not affect the power output.

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