Question detail
How can you identify an endothermic reaction from a reaction profile diagram?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energetics
Question
- A. The products are at a higher energy level than the reactants
- B. The activation energy is low
- C. The reaction releases heat
- D. The slope of the diagram is downward
Answer
The products are at a higher energy level than the reactants
Explanation
The evidence shows that in an endothermic reaction, the energy of the products is greater than that of the reactants, which is illustrated by the products being at a higher level in the reaction profile diagram. The implication is that energy is absorbed from the surroundings during the reaction. Therefore, the conclusion is that an endothermic reaction is identified by the products being at a higher energy level than the reactants.
Common mistake
Misinterpreting Reaction Profiles
Students often confuse the energy levels of reactants and products in reaction profile diagrams, leading to incorrect identification of exothermic and endothermic reactions.
To fix this, students should carefully analyze the diagram, noting that in exothermic reactions, the products are at a lower energy level than the reactants, while in endothermic reactions, the products are at a higher energy level. This understanding will help them accurately interpret the energy changes.
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