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More modern fireworks replace potassium nitrate with potassium chlorate. The thermochemical equation for the decomposition of potassium chlorate is shown in Equation 1. Often a catalyst is added to speed up this reaction.
Equation 1: 2KClO3(s) = 2KCl(s) + 3O2(g) ?H = -89.4 kJ mol-1
For reaction 1 draw a fully labelled diagram to show the internal energy changes during this process. On the same diagram show the effect the presence of a catalyst would have on the reaction.
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