Evaporation of alcohol is a classic example of a physical change. When alcohol evaporates, it transitions from a liquid state to a gas due to an increase in temperature or decrease in pressure. During this process, the molecular structure of the alcohol remains unchanged; only its state of matter alters.
In a physical change, the substance retains its chemical identity, meaning that when the alcohol evaporates, it can still be recognized as alcohol when it condenses back into a liquid. Unlike a chemical change, where bonds are broken and new substances are formed, evaporation simply involves the movement of molecules. Therefore, we conclude that evaporation of alcohol is indeed a physical change.