Question:
The following graph is obtained for a first-order reaction (A → P). The activation energy (E\(_a\) in kJ/mol\(^{-1}\)) and heat of reaction (ΔH in kJ/mol\(^{-1}\)) for this reaction are respectively
The following graph is obtained for a first-order reaction (A → P). The activation energy (E\(_a\) in kJ/mol\(^{-1}\)) and heat of reaction (ΔH in kJ/mol\(^{-1}\)) for this reaction are respectively
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To determine activation energy and heat of reaction from a potential energy diagram, remember that activation energy is the energy barrier, and heat of reaction is the difference in energy between products and reactants.
Updated On: Jun 6, 2025
- 5, 15
- 15, 5
- 25, 5
- 10, 25
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The Correct Option is B
Solution and Explanation
From the given graph, we can identify the activation energy (E\(_a\)) as the difference between the energy at the transition state and the energy of the reactants, which is 15 kJ/mol. The heat of reaction (ΔH) is the difference between the energy of the products and reactants, which is 5 kJ/mol. Therefore, the correct answer is option (2).
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