Question

differentiate between evaporation and distillation

Answer 1

Evaporation is the process of changing a liquid into its vapor stage. The word “evaporation” is specifically used when the vaporization happens from the surface of the liquid. Liquid vaporization can also happen at the boiling point where evaporation happens from whole liquid mass, but then it is not called as evaporation. Evaporation can be influenced by various factors like concentration of other substances in the air, surface area, pressure, temperature of the substance, density, flow rate of air .

Distillation is a physical separation method which is used to separate compounds from a mixture. It is based on the boiling points of the components in the mixture. When a mixture has different component with different boiling points, they evaporate at different times when we are heating. This principle is used in the distillation technique. If there are two substances in the mixture as A and B, we will assume A has the higher boiling point. In that case, when boiling, A will evaporate slower than B; therefore, the vapor will have a higher amount of B than A. Therefore, the proportion of A and B in the vapor phase is different from the proportion in the liquid mixture. The conclusion is that, the most volatile substances will be separated from the original mixture whereas, less volatile substances will remain in the original mixture.

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Answer 2

Answer:

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