Which set of procedures and observations indicates a chemical change?

(1) Ethanol is added to an empty beaker and the ethanol eventually disappears.

(2) A solid is gently heated in a crucible and the solid slowly turns to liquid.

(3) Large crystals are crushed with a mortar and pestle and become powder.

(4) A cool, shiny metal is added to water in a beaker and rapid bubbling occurs.