Practice Fuel Cell Thermodynamics (1.6) - Fuel Cells

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What are the main products generated by a hydrogen fuel cell?
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Think about what happens when hydrogen combusts.
Question 2.
Define Gibbs Free Energy in the context of fuel cells.
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Consider the ideal conditions for a reaction.
3Question 3.
Which of the following best describes Gibbs Free Energy?
- Total energy of a system
- Maximum work obtainable
- Electrical energy in a circuit
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Think about the conditions affecting work output.
4Question 4.
True or False: The theoretical efficiency for hydrogen fuel cells is around 50%.
- True
- False
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Recall the actual theoretical percentage discussed in class.
Question 5.
A hydrogen fuel cell has a Gibbs Free Energy change of 237 kJ/mol. Calculate the theoretical maximum efficiency if the enthalpy change is 286 kJ/mol.
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Use the efficiency formula discussed in class.
Question 6.
Explain how variations in gas concentrations can affect cell potential and efficiency in fuel cells.
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Consider real-life scenarios like fuel supply in different conditions.

5 more questions in this section. Enroll free to practise them all.