Final answer:
Distillation is the common method for compound identification in this context, which separates components of a mixture based on differences in volatility.
Step-by-step explanation:
The method commonly used in compound identification that the question refers to is distillation. Distillation is a physical process employed to separate homogeneous mixtures (solutions) into their component substances by taking advantage of differences in their volatilities. When a mixture of two or more substances is heated, the substance with the higher volatility vaporizes first. The vapor is then condensed back into liquid form and collected separately, effectively separating it from other components of the mixture. This method is especially useful when the components have significantly different vapor pressures, which allows for the selective vaporization and subsequent condensation of the more volatile component.
For instance, if a solution contains water and another liquid component with a lower boiling point than water, heating the solution will cause the component with the lower boiling point to evaporate first. The vapor is then directed into a condenser where it cools and transitions back into a liquid, thus being separated from water.