A Fuel Cell Works on the Same Principle as a Battery

question 120

Multiple Choice

A fuel cell works on the same principle as a battery but is continually fed with fuel. In one fuel cell, methanol (CH₃OH) enters on one side of the unit, and air enters on the other side. Both circulate past electrodes, and a chemical reaction occurs that produces electricity, plus carbon dioxide and water as byproducts. Which balanced chemical reaction equation best represents the reaction that occurs in this fuel cell?

• A) CH₃OH \(\rightarrow\)CO₂ + H₂O
• B) CH₃OH \(\rightarrow\)CH₃ + OH
• C) CH₃OH \(\rightarrow\)CH₂ + H₂O
• D) CH₃OH + O₂ \(\rightarrow\) CO₂ + H₂O
• E) 2CH₃OH + 3O₂ \(\rightarrow\)2CO₂ + 4H₂O

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