S8 + 8O2 → 8SO2 + energy

is a combustion reaction.

Here's why:

* Combustion is a chemical process that involves the rapid reaction between a substance with an oxidant, usually oxygen, to produce heat and light.

* In this reaction, sulfur (S8) reacts with oxygen (O2) to produce sulfur dioxide (SO2) and release energy (heat).

* The energy released is the characteristic feature of a combustion reaction.

Let me know if you have any other chemical reactions you'd like help identifying!