differentiate between evaporation and distillation
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Distillation is a controlled process commonly used in chemistry to separate mixtures of liquids. The process includes boiling a liquid and then collecting the vapor as it cools and condenses back into liquid form. Boiling is similar to evaporation because both processes turn a liquid into a gas.
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What is the difference between Evaporation and Distillation?
• In the distillation method, vaporization takes place at the boiling point whereas, in evaporation, vaporization takes place below the boiling point.
• Evaporation takes only from the surface of the liquid. In contrast, distillation is taking place from the whole liquid mass.
• At the boiling point of the distillation process, the liquid forms bubbles and there is no bubble formation in evaporation.
• Distillation is a separation or purifying technique, but evaporation is not necessarily so.
• In distillation, heat energy should be supplied to liquid molecules to go in to the vapor state but, in evaporation, an external heat is not supplied. Rather, molecules get energy when they collide with each other, and that energy is used to escape to the vapor state.
• In distillation, the vaporization happens rapidly, whereas the evaporation is a slow process.