Classify the reaction endothermic or exothermic and give the change in enthalpy of the reaction.

2 SO₃ (g) $\displaystyle \to$ 2 S (s) + 3 O₂ (g)

$\displaystyle \Delta$ H = 984 kJ

The heat energy in the reaction is Select an answer released absorbed .

This makes the reaction Select an answer endothermic exothermic .

So, the energy would be on the Select an answer reactant product side.