The physical property exploited when separating water and vinegar is their difference in boiling points. Water boils at 100 degrees Celsius, while vinegar boils at a higher temperature of about 118 degrees Celsius. This difference in boiling points allows us to separate the two liquids through a process called distillation.

In distillation, we heat the mixture of water and vinegar to a temperature between 100 and 118 degrees Celsius. The water will start to boil and evaporate, while the vinegar will remain in the liquid state. The water vapor is then condensed back into a liquid, and we can collect the separated water.

Distillation is a commonly used technique for purifying liquids and separating mixtures of liquids with different boiling points.