Lead is most commonly extracted from an ore called galena, PbS. Extracting lead from the galena ore involves two steps. Step 1: The galena ore is roasted in air to produce lead oxide, PbO. Step 2: The lead oxide is heated in a blast furnace with carbon. The reaction in step 1 is an exothermic reaction. Draw a labelled reaction profile diagram for an exothermic reaction. Label the activation energy and the energy change on your diagram. – 7556

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1. The graph has the axes correctly labelled as “Enthalpy, H” and “Progress of reaction”. The products are shown lower than the reactants because it’s an exothermic reaction. The activation energy is marked as Ea, and the energy change ΔH is also correctly labelled.

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