Question

get it? classify which techniques for separating mixtures depend on phase changes and identify the change used by each.

Explanation:

Step1: Recall separation techniques

Distillation and evaporation - condensation are common separation techniques that rely on phase - changes.

Step2: Analyze distillation

Distillation involves heating a liquid mixture to its boiling point, vaporizing the more volatile component, and then condensing the vapor back to a liquid. The phase - change is liquid to gas (vaporization) and gas to liquid (condensation).

Step3: Analyze evaporation - condensation

Evaporation is the conversion of a liquid to a gas at a temperature below its boiling point. Condensation is the reverse process. For example, in the separation of salt from salt - water solution, water is evaporated leaving behind salt, and the water vapor can be condensed if collected. The phase - changes are liquid to gas (evaporation) and gas to liquid (condensation).

Answer:

Techniques like distillation and evaporation - condensation depend on phase changes. Distillation uses liquid - to - gas (vaporization) and gas - to - liquid (condensation) changes. Evaporation - condensation uses liquid - to - gas (evaporation) and gas - to - liquid (condensation) changes.