What is the azeotropic point of ethanol and water? What is the boiling point of ethanol?

Between °C and 100°C, its boiling point varies in the range depending on the solute and solvent.

°C between 100°C, depending on their proportion.

The boiling point of water is 100°C

Ethanol (English: ethanol, structure short: ch3ch2oh) is a kind of alcohol, is the main component of wine, so it is also called alcohol, and in some places it is commonly known as fire wine.

The chemical formula can also be written as C2H5OH or ETOH, where ET stands for ethyl group. Ethanol is flammable and is commonly used as a fuel, solvent and disinfectant, as well as in the preparation of other compounds. Industrial alcohol contains a small amount of methanol, and medical alcohol mainly refers to ethanol with a concentration of about 75%, and also includes other concentrations of alcohol that are widely used in medicine.

Ethanol is isomeric to methyl ether.

Physicochemical constants. Density: g cm 3; (liquid) 20°C melting point: °C (k).

Boiling Point: °C (k).

When dissolved in water: pka =

Viscosity: mpa·s (cp), c

Molecular dipole moment: fc·fm (d) (gas) refractive index:

Relative density (water = 1):

Relative vapor density (air = 1):

Saturation vapor pressure (kpa): Ethanol.

Heat of combustion (kj mol):

Critical temperature ( ).

Critical Pressure (MPa):

Octanol The logarithm of the water partition coefficient:

Flash point ( ) 12

Ignition temperature ( ) 363

**Upper Limit %(v v):

**Lower Limit %(v v):

Solubility: Miscible with water, miscible in most organic solvents such as ether, chloroform, glycerol, etc.

Ionization: Non-electrolyte.

Colorless, transparent, liquid with special fragrance (volatile), less dense than water, and can be miscible with water in any ratio (generally cannot be used as an extractant). It is an important solvent that can dissolve a variety of organic and inorganic substances.

It depends on the proportions and other circumstances.

For example, at one atmosphere, the weight ratio is that the azeotropic point of ethanol and water is, while in other cases, ethanol generally boils first and evaporates first.

A two-component system formed by mixing two substances that are liquid at room temperature is called a two-component system. The complete miscible two-liquid system is at constant pressure, such as the ethanol-aqueous solution has the lowest constant boiling point, at a pressure of 1 atmosphere, the ethanol content is, and the boiling point is.

See Physical and Chemical Experiments, two-liquid gas-liquid equilibrium phase diagram.

The boiling point of ethanol is 78 degrees Celsius.

Ethanol is a colorless transparent, volatile, flammable, non-conductive liquid at room temperature and pressure, and its aqueous solution has the smell of wine and tastes sweet. At 20 degrees at room temperature, the ethanol liquid density is g cm3. The melting point of ethanol is , and the boiling point is.

Ethanol vapor can form a ** mixture with air. 20, the refractive index of ethanol.

ImpactEthanolThe boiling point of the factor

1) The number of -oh in the molecule: the more -oh, the higher the boiling point. For example, the boiling point of ethanol is 78, and the boiling point of ethylene glycol is 179.

2) The number of carbon atoms in the molecule: the more carbon atoms, the higher the boiling point. For example, the boiling point of methanol is 65, and the boiling point of ethanol is 78.

The above content reference: Encyclopedia-ethanol.

The boiling point of ethylene glycol is. Countries have adopted ethylene glycol as an antifreeze almost exclusively since the 50s. Ethylene glycol is a colorless, transparent, slightly sweet, hygroscopic viscous liquid that is soluble with water in any proportion.

When the concentration of ethylene glycol is different.

The freezing point is also different. The freezing point of ethylene glycol-water antifreeze is not linearly related to the mass fraction of ethylene glycol. The freezing point of its aqueous solution does not completely decrease with the increase of concentration, and when the concentration exceeds 70%, the freezing point rises.

In the process of preparation, it should be reasonably selected from the actual situation to meet the requirements of frost resistance and economy. In Jiangnan, China, the ratio of ethylene glycol with a mass fraction of 40% is generally used, while in the cold north, it is more appropriate to take a ratio of about 50% of ethylene glycol by mass fraction.

The above content reference: Encyclopedia-ethylene glycol.

The boiling point of ethanol is °C.

Ethanol chemical formula C2H5OH. A colorless, transparent liquid with a special aroma, lighter than water. The density at 20 is 0 7893g cm3, the boiling point is 78 5, it is volatile, and it can be miscible with water in any ratio.

Industrial alcohol and chemically pure alcohol contain ethanol 95 6, usually laboratory preparation of anhydrous ethanol is to add quicklime to 95 6 ethanol reflux, water and lime reaction to produce calcium hydroxide, evaporated ethanol contains trace water (0 2), and then treated with sodium or magnesium.

The boiling point of alcohol is Celsius. The scientific name is ethanol, which is a volatile colorless transparent liquid at room temperature and pressure, with low toxicity, and pure liquid cannot be directly drunk.

Hello, the proportion of ethanol and water in the mixture formed by mixing ethanol and water at a certain temperature refers to the ratio of ethanol and water in the mixture, so that the boiling point of the mixture is the same as that of pure ethanol or pure water. This ratio is determined by factors such as the molecular weight of ethanol and water, intermolecular interaction forces, temperature, etc.

At room temperature, the azeotropic ratio of ethanol and water is about 95% ethanol and 5% water. This means that at a temperature of 95% for ethanol and water and 5% for water, the boiling point of the mixture is the same as that of pure ethanol. At other temperatures, the azeotropic ratio of ethanol and water will vary.

The determination of the proportion of azeotropes is of great significance for brewing, chemistry, pharmaceuticals and other fields. For example, when brewing beer, distilled spirits and other alcoholic beverages, the ratio of ethanol and water needs to be controlled to achieve the desired alcohol content and taste; In the pharmaceutical process, the determination of the azeotrope ratio is also very important, because it is related to the purity and stability of the drug.

Ethanol-water azeotrope refers to a mixture that will evaporate at the same time when ethanol and water are mixed to reach their boiling point at a certain temperature. The ethanol-water azeotrope ratio refers to the volume or mass ratio of ethanol and water at the azeotropic temperature.

The ratio depends on the azeotropic temperature and the mixing ratio of ethanol and water. At 760 millimeters of mercury, the azeotropic temperature of ethanol-water is Celsius. When the ratio of ethanol and water is mixed is 95:

5, the volume ratio of azeotrope is about ethanol and water. When the mixing ratio is 50:50, the volume ratio is about 81% ethanol hail and 19% water.

When the mixing ratio is 5:95, the volume ratio is about 34% ethanol and 66% water.

It should be noted that the ethanol-water azeotrope ratio is in the case of azeotropic and if the temperature changes, the ratio will also change. At the same time, the proportion of azeotrope in the ethanol water cavity is also affected by atmospheric pressure, and if the pressure changes, it will also lead to a change in the proportion.

Ethanol and water can form an azeotropic mixture at a certain temperature, and the ratio of ethanol and water in the mixture depends on the value of the azeotropic temperature. Here are some data on the ratio of ethanol-water azeotrope at different azeotropic temperatures:

1.When the azeotropic temperature is, the molar ratio of ethanol and water in the mixture is, and the volume ratio is.

2.When the azeotropic temperature is, the molar ratio of ethanol potato to water in the mixture is, and the volume ratio is.

3.When the azeotropic temperature is, the molar ratio of ethanol and water in the mixture is, and the volume ratio is.

It should be noted that the ratio of ethanol to water in the actual situation will be affected by many factors such as temperature, material pressure, distillation degree, etc. Therefore, if it is necessary to accurately calculate the ethanol-water azeotrope ratio, it is necessary to carry out experimental measurements according to the specific experimental conditions.

Ethyl acetate. Chemical formula CH3Cooc2H5. Also known as "ethyl acetate", colorless, fragrant liquid, boiling point 77, melting point, density, soluble in ethanol, chloroform, ether and benzene.

It is easy to hydrolyze and saponification reactions. It is flammable, and its vapor and air form a ** mixture. It is used as a solvent in the spice and paint industry and is also an important raw material for organic synthesis.

Ethanol boiling point: °C ( K).

In between, depending on the solute and solvent the bridge is destroyed, its boiling point varies in the range.