Iodine (I₂) is a solid at room temperature. When heated, it undergoes sublimation, directly transitioning from solid to gas. There isn't a single chemical equation for this process, but rather a representation of the physical change:

I₂(s) → I₂(g)

Here's the breakdown:

* I₂(s): This represents solid iodine.

* I₂(g): This represents gaseous iodine.

The arrow indicates the direction of the change, from solid to gas.

It's important to note that this is a physical change, meaning the chemical composition of iodine doesn't change. It simply changes its state of matter.