When methanol burns, it undergoes a chemical change where the methanol molecules react with oxygen to produce carbon dioxide and water vapor alongside generating heat and light energy.

Methanol (CH3OH) + Oxygen (O2) → Carbon Dioxide (CO2) + Water (H2O)

This reaction involves the breaking and formation of chemical bonds, resulting in a completely different substance (carbon dioxide and water) from the original methanol. Therefore, burning methanol is a chemical change.