Question detail
Fuel-cell comparison. In Reaction profiles, hydrogen is supplied continuously with oxygen. Which conclusion best supports reaction profile?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Exothermic and endothermic reactions
Question
- A. Fuel-cell comparison: A fuel cell uses an external fuel supply and produces a potential difference.
- B. A fuel cell stores all reactants inside like a single-use cell.
- C. A fuel cell works only when products have greater bond energy.
- D. A fuel cell is the same as a temperature-change practical.
Answer
The correct option is Fuel-cell comparison: A fuel cell uses an external fuel supply and produces a potential difference..
Explanation
The correct option is Fuel-cell comparison: A fuel cell uses an external fuel supply and produces a potential difference.. This scenario keeps the answer anchored to Reaction profiles in Exothermic and endothermic reactions. It supports reaction profile 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 Activation Energy
Students often confuse activation energy with the overall energy change of the reaction, thinking they are the same.
Remember that activation energy is the minimum energy required for reactants to collide and react, while the overall energy change refers to the difference in energy between reactants and products.
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