Question

what happens during the process of evaporation?
liquid is added to dissolve two solids with different boiling points.
gas is added to separate two different types of liquids.
heat is applied to crystallize a dissolved solid and remove the liquid.
pressure is added to force the gas out of the liquid.

Explanation:

Evaporation is a phase change process where a liquid turns into gas, typically driven by heat. Let's analyze each option:

1. The first option describes dissolving solids, not evaporation.
2. The second option refers to gas-assisted liquid separation, not evaporation.
3. The third option matches: heat is used to turn liquid into vapor, leaving dissolved solid as crystals (a common application of evaporation for separating solute and solvent).
4. The fourth option describes degassing via pressure, not evaporation.

Answer:

Heat is applied to crystallize a dissolved solid and remove the liquid.