Distillation and evaporation, what is the difference in definition?

Evaporation is the process by which a liquid or solid state is converted into a vapor state and escapes into the atmosphere.

Distillation is to use the difference in the volatility of each component in the liquid mixture to partially vaporize the liquid mixture and subsequently condense the vapor, so as to achieve the separation of some of the substances contained in it.

Evaporation can be seen as a step in distillation, even when a liquid (or solid) becomes gaseous; Distillation, on the other hand, is the process of evaporation and then condensation.

The purpose of distillation is to separate and remove volatile, involatile, or non-volatile impurities (suitable for separating liquid mixtures or solid-liquid mixtures with different boiling points and blending), and use them in purification and purification; Evaporation, on the other hand, is just a physical phenomenon and is suitable for separating solvents and solutes.

Distillation is a means of separating substances according to the different boiling points of different substances, therefore, heating is required; Evaporation is a physical phenomenon that can be done at any temperature, similar to "volatilization".

Evaporation: iron frame (or tripod), evaporation dish, alcohol lamp, etc.

2.Distillation: iron frame with iron ring, alcohol lamp, asbestos net, distillation flask, thermometer, condenser tube, horn tube, Erlenmeyer flask (receiver).

Evaporation: The liquid in the evaporation dish should not exceed two-thirds of the volume; When heating, stir constantly with a glass rod and clamp the evaporation dish with crucible pliers; When there are more solids, stop heating, and use waste heat to heat and evaporate; When removing the uncooled evaporation dish, place it on the asbestos net.

Distillation: The volume of the solution should not exceed one-third of the volume of the flask; Put zeolite or porcelain chips; The mercury ball of the thermometer is located at the mouth of the branch pipe; Water, go down and go up; Water first, then heat; The temperature is strictly controlled throughout the process.

Evaporation: evaporate the salt solution to obtain salt crystals; Evaporate the sodium chloride solution to obtain sodium chloride crystals; drying clothes; Autumn morning fog, etc.

Distillation: separation of a mixture of ethanol and water; distilled water from tap water; Separation of mixtures of sodium carbonate and ethyl acetate, etc.

Distillation Heating a liquid to turn it into vapor, and then cooling the vapor to condense into a liquid. Evaporation The phenomenon in which a liquid transpires and volatilizes into water vapor. Evaporation is just a physical phenomenon, whereas distillation is a method of purifying a substance.

There must be evaporation in the process of distillation, but the process of evaporation is not necessarily distillation.

Distillation is the separation of liquids with different boiling points, which is a method of separation;

Evaporation is the process by which a liquid becomes a gas, which is a change of state.

Evaporation and distillation are both methods of separating two solutions with different solubilities.

Evaporation changes from a liquid state to a gaseous state, and there is no need to re-cool the gas into a liquid.

Distillation is a series of operations that require steps such as condensation to change from liquid to gaseous to liquid back to liquid to separate two solutions.

Distillation is an experimental operation to separate liquid mixtures according to the different boiling points, and the experimental devices required include flasks, Erlenmeyer flasks, thermometers, alcohol lamps, condenser tubes, receivers, etc.; Evaporation is a physical process that refers to the process of endothermic vaporization of a liquid into a gas, which is a change in the physical state.

1. The process is different.

Distillation uses the unit operation process of evaporating the components with low boiling point and then condensing to quickly remove the whole component by using the different boiling points of each component in the mixed liquid or liquid-solid system, which is a combination of evaporation and condensation.

Evaporation is the process of using heating to continuously volatilize solvents in solution and precipitate solutes (crystals).

2. Different classifications.

Distillation is divided into simple distillation, balanced distillation, rectification distillation, and special distillation;

Evaporation can be divided into atmospheric evaporation and vacuum evaporation.

1. Evaporation refers to the removal of the solvent in the solution by heating, and the remaining solute solid. Distillation, on the other hand, is the process in which a liquid is vaporized by heating and then liquefied by condensation. What is left is the liquid that is evaporated, and the evaporation is the solid that is left.

2. Distillation uses the unit operation process of evaporating the low boiling point components and then condensing to separate the whole component by using the mixed liquid or liquid-solid system to evaporate and then condense to separate the whole component, which is the combination of evaporation and condensation.

Specific differences1. Distillation is the process of vaporizing a liquid by heating and then liquefiing it by condensation. Evaporation generally refers to the removal of the solvent in the solution by heating, leaving the solute solid we want.

2. The process is different, distillation uses the different boiling points of each component in the liquid or liquid-solid system to evaporate the low boiling point components, and then touch the condensation to separate the unit operation process of the entire component, which is the combination of evaporation and condensation; Evaporation is the process of using heating to continuously volatilize the solvent in the solution and precipitate solutes.

3. The classification is different, and distillation is divided into simple distillation, balanced distillation, rectification and special distillation according to the method; Evaporation can be divided into atmospheric pressure evaporation and shock and reduction evaporation.

Evaporation and distillation are not the same process, and there are several main differences from nucleus:

1. Different definitions: evaporation refers to the solvent in the solution by heating to remove the water, leaving the solute solid. The purpose of evaporation is to separate the solid solute from the solution, such as the evaporation of sodium chloride solution to separate table salt.

The process by which water transitions from a liquid or solid state to a vapor state and enters the atmosphere is called evaporation.

Distillation is the process of vaporizing a liquid by heating it and then liquefiing it by condensation. Using the difference in the volatility of each component in the liquid mixture, the liquid mixture is partially vaporized and partially condensed with the steam, so as to achieve the separation of the components contained in it, which is called distillation. The distillation process is the process of separating liquid mixtures, when the boiling points of the components in the mixture are quite different, in order to achieve effective separation, the boiling point of pure compounds needs to be determined first, purified, and the purity of the substances containing a small amount of impurities is improved by distilling the solvent, or evaporating part of the solvent to concentrate the solution.

2. Different meanings: evaporation is a very common natural phenomenon, and distillation is a chemical phenomenon, which is used to separate two mixed liquids with different boiling points, such as mixed liquids of water and alcohol, because the boiling points of the two are different, the temperature is controlled between the boiling points of alcohol and water to separate the two.

3. Different purposes: the purpose of evaporation is to separate the solid solute in the solution and keep an eye on it, and distillation is to extract a certain mixture according to the boiling shed and point of the mixture.