Practice - Important Thermodynamic Quantities
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Practice Questions
Test your understanding with targeted questions
What does ΔH represent in a fuel cell?
💡 Hint: Think about energy in terms of heat and work.
What does ΔG measure?
💡 Hint: Connect it to the efficiency of energy use.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the equation for cell potential (E)?
💡 Hint: Recall the components that go into the cell potential calculation.
Is ΔG always greater than ΔH?
💡 Hint: Reflect on what happens to energy in a practical scenario.
3 more questions available
Challenge Problems
Push your limits with advanced challenges
Given the data for a fuel cell with ΔH = 300 kJ and ΔG = 240 kJ at high pressure, calculate its theoretical efficiency and discuss how changing the operating conditions might affect this efficiency.
💡 Hint: Focus on what pressure does to reactions.
If a fuel cell operates at a non-ideal temperature leading to ΔH becoming 320 kJ while ΔG remains at 240 kJ, what can you infer about the efficiency and what strategies could improve it?
💡 Hint: Think about how you might keep the cell conditions optimal.
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