Which of the following would be considered a fuel cell?Group of answer choices2Fe(s) + O2(g) + 4H+(aq) → 2Fe2+(aq) + 2H2O(l)Zn(Hg) + HgO(s) → ZnO(s) + Hg(l)C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)Pb(s) + PbO2(s) + 4H+(aq) + 2SO42-(aq) → 2PbSO4(s) + 2H2O(l)Zn(s) + 2NH4+(aq) + 2MnO2(s) → Zn2+(aq) + 2NH3(aq) + H2O(l) + Mn2O3(s)
Question
Which of the following would be considered a fuel cell?Group of answer choices2Fe(s) + O2(g) + 4H+(aq) → 2Fe2+(aq) + 2H2O(l)Zn(Hg) + HgO(s) → ZnO(s) + Hg(l)C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)Pb(s) + PbO2(s) + 4H+(aq) + 2SO42-(aq) → 2PbSO4(s) + 2H2O(l)Zn(s) + 2NH4+(aq) + 2MnO2(s) → Zn2+(aq) + 2NH3(aq) + H2O(l) + Mn2O3(s)
Solution
The fuel cell is a device that converts chemical potential energy (energy stored in molecular bonds) into electrical energy. A PEM (Proton Exchange Membrane) cell uses hydrogen gas (H2) and oxygen gas (O2) as fuel. The products of the reaction in the cell are water, electricity, and heat.
Looking at the given reactions, none of them directly involve the conversion of hydrogen and oxygen into water and electricity. However, the reaction that most closely resembles a fuel cell reaction is:
Pb(s) + PbO2(s) + 4H+(aq) + 2SO42-(aq) → 2PbSO4(s) + 2H2O(l)
This is the reaction that takes place in a lead-acid battery, which is a type of rechargeable battery that uses a lead anode, a lead dioxide cathode, and an electrolyte of sulfuric acid. It's not a fuel cell in the strictest sense, but it's the closest match to a fuel cell reaction among the given options.
Similar Questions
Which of the following is the best energy fuel for a cell?Group of answer choicesADP, because it forms ATP.Level: ModerateProtein, because it has energy-rich C-N bonds.Glucose, because it has the highest proportion of C-O bonds.Lipids, because they have the highest proportion of C-H bonds.
A fuel cell is one in which -----------.a.chemical energy is converted to potential energyb.chemical energy is converted to solar energyc.chemical energy is converted to mechanical energyd.chemical energy is converted to electrical energy
Which of the following statements about hydrogen-oxygen fuel cells is not true?The only waste product is waterElectrical energy is produced from the oxidation of hydrogenHydrogen must be supplied constantlyAn acidic electrolyte is require
What is the fuel used in a fuel-cell automobile?A.Hydrogen gasB.Solar energyC.Fossil fuelsD.Water vapor
Select all that applyWhich of the following are the two primary sources of fuel for cells? Select the two best responses.Multiple select question.CarbohydratesWaterProteinsFats
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.