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In hydrogen-oxygen fuel cell,combustion of hydrogen occurs to
- a)generate heat
- b)create potentials difference between electrodes
- c)produce high purity water
- d)remove absorbed oxygen from electrode surface
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
In hydrogen-oxygen fuel cell,combustion of hydrogen occurs toa)generat...
Direct conversion of chemical energy to electric energy can be made considerably more efficient (i.e. upto 75%) than the 40% maximum now obtainable through burning of fuel and using the heat to form steam for driving turbines. Furthermore, the water obtained as a byproduct may be used for drinking by the astronauts.
At anode: 2H2(g) + 4OH–(aq) → 4H2O(l) + 4e–
At cathode: O2(g) + 2H2O(l) + 4e– → 4OH–(aq)
2H2(g) + O2(g) → 2H2O(l)
Most Upvoted Answer
In hydrogen-oxygen fuel cell,combustion of hydrogen occurs toa)generat...
Explanation:
Generating Potential Difference:
- In a hydrogen-oxygen fuel cell, the combustion of hydrogen occurs at the anode.
- This reaction generates a flow of electrons, creating a potential difference between the electrodes.
How Fuel Cells Work:
- Fuel cells generate electricity through an electrochemical reaction.
- Hydrogen is fed into the anode, where it is split into protons and electrons.
- The protons move through an electrolyte to the cathode, while the electrons flow through an external circuit, generating electrical current.
- At the cathode, oxygen reacts with the protons and electrons to produce water as a byproduct.
Importance of Potential Difference:
- The potential difference created between the electrodes is crucial for the functioning of the fuel cell.
- It drives the flow of electrons through the external circuit, producing electrical energy that can be used to power various devices.
Conclusion:
In a hydrogen-oxygen fuel cell, the combustion of hydrogen primarily occurs to generate a potential difference between the electrodes. This potential difference is essential for the conversion of chemical energy into electrical energy, making fuel cells a clean and efficient power source.
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In hydrogen-oxygen fuel cell,combustion of hydrogen occurs toa)generate heatb)create potentials difference between electrodesc)produce high purity waterd)remove absorbed oxygen from electrode surfaceCorrect answer is option 'B'. Can you explain this answer?
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