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What is a reaction profile, and how can it be used to compare catalysed and uncatalysed reactions?
Try the question, check the answer, then read the explanation to understand the curriculum point.
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Rate of reaction
Question
What is a reaction profile, and how can it be used to compare catalysed and uncatalysed reactions?
Answer
A reaction profile is a graphical representation showingthe energy changes duringa chemical reaction. It can be used to compare catalysed and uncatalysed reactions by illustratingthe difference in activation energy; the catalysed reaction will show a lower peak energy compared to the uncatalysed reaction.
Explanation
This question tests the understandingof reaction profiles and the role of catalysts in loweringactivation energy. It requires students to recall definitions and apply their knowledge to compare two types of reactions.
Common mistake
Misunderstanding Reaction Profiles
Students often confuse the energy levels of reactants and products in catalysed and uncatalysed reactions on reaction profiles.
To fix this, students should practice sketching reaction profiles, clearly labeling the activation energy for both catalysed and uncatalysed pathways, and noting how the catalyst lowers the activation energy.
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