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Igcse chem paper 2

What was the answer for the last question and the shape of the graph.
As I can remember it was the enthalpy change cant remember the exact value but it was a minus value for sure..the shape of the graph is like that curved shape and it is exothermic..And need to label the enthalpy change which in the value between the product and reactant and the Activation energy is the value between the reactant level and the maximum point of the graph...

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