What Causes The Styrofoam To Disappear Into The Acetone?

What Causes The Styrofoam To Disappear Into The Acetone? It is a physical rather than a chemical reaction. The air in the foam leaves, and because Styrofoam consists mainly of air, when it dissolves in acetone it completely loses its structure. The acetone splits up the long chain of molecules, and the air disappears, causing