# If sulfur dioxide and oxygen can be made into sulfur trioxide, what is the reverse reaction?

$S {O}_{3} \left(g\right) r i g h t \le f t h a r p \infty n s S {O}_{2} \left(g\right) + \frac{1}{2} {O}_{2}$
Vast quantities of $\text{sulfur trioxide}$ are utilized industrially for sulfuric acid synthesis:
$S {O}_{3} + {H}_{2} O r i g h t \le f t h a r p \infty n s {H}_{2} S {O}_{4}$