Question

try it: energy of reactions
the energy diagram on the right is an example of an......
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exothermic
endothermic

Explanation:

In an exothermic reaction, the energy of the products is lower than that of the reactants, and $\Delta H<0$. In an endothermic reaction, the energy of the products is higher than that of the reactants, and $\Delta H > 0$. Looking at the energy - diagrams, in both cases, the energy of the products is lower than that of the reactants, so $\Delta H<0$.

Answer:

Exothermic