Question detail
Reaction-profile label. In Fuel cells, a graph shows reactants, products and a peak. Which conclusion best supports chemistry only?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical cells and fuel cells (chemistry only)
Question
- A. Reaction-profile label: The peak represents the energy barrier particles must overcome.
- B. The peak is the final energy of the products.
- C. The peak is the voltage produced by the cell.
- D. The peak shows the mass of reactants used.
Answer
The correct option is Reaction-profile label: The peak represents the energy barrier particles must overcome..
Explanation
The correct option is Reaction-profile label: The peak represents the energy barrier particles must overcome.. This scenario keeps the answer anchored to Fuel cells in Chemical cells and fuel cells (chemistry only). It supports chemistry only without repeating the same wording as nearby Energy changes questions, and it separates exothermic, endothermic, activation-energy, bond-energy, cell and fuel-cell ideas.
Common mistake
Misunderstanding Half Equations
Students often confuse the half equation for the hydrogen electrode reaction with the overall reaction of the fuel cell.
Focus on the specific half equation for the hydrogen electrode, ensuring to include the correct reactants, products, and charges.
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