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Copy the diagram of an exothermic reaction profile into your answer book and mark clearly (i) the activation energy, (ii) \( \Delta H \) for the reaction - Leaving Cert Chemistry - Question ii - 2008

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Copy the diagram of an exothermic reaction profile into your answer book and mark clearly (i) the activation energy, (ii) \( \Delta H \) for the reaction. ![Exothe... show full transcript

Worked Solution & Example Answer:Copy the diagram of an exothermic reaction profile into your answer book and mark clearly (i) the activation energy, (ii) \( \Delta H \) for the reaction - Leaving Cert Chemistry - Question ii - 2008

Step 1

(i) the activation energy

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Answer

The activation energy (Ea) can be marked on the diagram by drawing a vertical line from the peak of the energy barrier down to the energy level of the reactants. This line represents the minimum energy threshold required for the reaction to occur.

Step 2

(ii) \( \Delta H \) for the reaction

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Answer

The change in enthalpy (( \Delta H )) should be indicated by drawing a horizontal line that measures the difference in energy between the reactants and the products. This line will extend from the energy level of the reactants down to the energy level of the products, reflecting the energy released in the exothermic reaction.

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