Is it possible to measure the temperature of boiling water at 100 degrees Celsius with an alcohol th

No, it is not possible to measure accurately when the temperature of the analyte exceeds the boiling point of alcohol, but not necessarily. Hehe, because I also had such a curiosity and was the first person to eat such a crab.

Let me tell you ... First of all. You're sure yours is an alcohol thermometer.

Secondly, it doesn't matter exactly what the boiling point is.

78 degrees is the boiling point at 101 kPa.

And the alcohol thermometer, you have to ask him to measure thousands of degrees.

When making it, the glass should be made thicker, and then the pressure should be added when filling with alcohol, such as 2MPa, which is 20 atmospheres, which is not that large. Generally, the alcohol thermometer is on the left and right pressure. Do you have a feeling of ** when you break it?

Then the boiling point will rise as soon as it exceeds 100 degrees. Then making a thermometer of 100 degrees is not a problem.

Put the thermometer down to the reach first.

0 degrees (absolute environment) is marked with 0 scales.

When placed at 100 degrees (absolute environment), it is marked with 100 degrees.

First you have to know.

After the substance is compressed vs. before compression.

The rate of expansion of his own monomer is relative to the rise in temperature.

That is, relatively speaking, it is still an absolute equilibrium expansion.

Therefore, there will be no uneven temperature scale.

Draw 100 scales between 0-100 degrees, with each scale being 1 degree.

You can draw tens of thousands of lines.

But it must be absolutely uniform glass and other containers and absolutely uniform scale marks.

It may be that the air pressure is relatively low during the experiment.

When the liquid reaches a certain temperature, the surface and the inside will be violently vaporized at the same time, and this vaporization is called boiling. The liquid that is transformed from crystals is heated when boiling, but the temperature remains the same, and the temperature at this time is called the coded boiling point. The boiling point of ethanol is 78 degrees, which is its boiling point at standard atmospheric pressure.

The boiling point of a liquid is related to the air pressure on the liquid surface, the air pressure decreases, the boiling point decreases, the air pressure increases, and the boiling point increases.

The boiling point of a liquid is also related to air pressure, and the presence of water can also cause a decrease in the boiling point.

The boiling point of alcohol is 78 degrees Celsius.

At standard atmospheric pressure, the boiling point of alcohol is 78 and the boiling point of water is 100 Put them in two test tubes, and then put the two test tubes in 100 boiling water that is constantly heated.

In the number of boiling water returns where the temperature reaches the boiling point of water 100, the temperature of the water remains constant; The water in the test tube absorbs heat from the beaker, and after the temperature reaches the boiling point of the water, it is the same as the temperature of the water in the beaker, and it cannot continue to absorb heat from the beaker, and although the boiling point of the water is reached at 100, it cannot absorb heat, so it will not boil.

Equipped with an alcohol test tube, the temperature remains the same after the water boils, but because the boiling point of alcohol is 78, which is lower than the boiling point of water, when the alcohol in the test tube reaches the boiling point of alcohol, but can still absorb heat from the boiling water, it will boil.

Classification of alcohol.

According to the raw materials used in production, it can be divided into starch raw material fermentation alcohol, molasses raw material fermentation alcohol, sulfur salt pulp waste liquid fermentation production alcohol. Fermentation of alcohol from starchy raw materials (generally there are starchy raw materials such as potatoes, cereals and wild plants, which are hydrolyzed into potatoes and glucose under the action of microorganisms, and then further fermented by yeast to produce alcohol).

Fermentation of alcohol from molasses raw materials (directly using the sugar in molasses, diluting and sterilizing and adding some nutrients, and fermenting to produce alcohol through the action of yeast); Sulfite pulp waste liquid is fermented to produce alcohol (using the six-carbon sugar contained in the papermaking waste liquid to ferment into alcohol under the action of yeast, and the main product is industrial alcohol.) There is also alcohol made by hydrolysis of dilute acid from wood chips).

Ethanol is an organic compound with a simple structure of CH3CH2OH or C2H5OH and a segmented molecular formula of C2H6O

Melting point. Old burning noise (normal pressure).

Boiling point. atmospheric pressure).

Density. g/cm³(20 ℃)

1. At standard atmospheric pressure: the boiling point of alcohol is.

2. Under standard atmospheric pressure, the boiling temperature of water is 100.

3. The boiling point of water is related to atmospheric pressure, and when the atmospheric pressure increases, the boiling point of water will also increase.

Alcohol has a boiling point of 100 degrees Celsius, while water has a boiling point of 100 degrees Celsius.

The boiling point of alcohol varies depending on the concentration.

The boiling point of alcohol at atmospheric pressure is about 78 degrees.

The temperature at which alcohol boils is 78 and the temperature at which water boils is 100.

The boiling point of a liquid is related to the external pressure. When the pressure of the liquid increases, its boiling point increases; When the pressure decreases; The boiling point decreases. For example, the steam pressure in a steam boiler is about a few tens of atmospheres, and the boiling point of water in a boiler can be more than 200.

For another example, when cooking rice in a high mountain, the water is easy to boil, but the rice is not easy to cook.

This is due to the fact that the atmospheric pressure decreases with the increase in the topography and the boiling point of water also gradually decreases with the increase in altitude. (At an altitude of 1,900 meters, the atmospheric pressure is about 79,800 Pa (600 mm Hg), and the boiling point of water is a return loss, with low boiling points generally vaporizing first, and high boiling points generally more difficult to vaporize.)

They are 78 degrees Celsius and 100 degrees Celsius. Therefore, alcohol and water can be separated by fractional distillation.

The temperature at which alcohol boils is 78 and the temperature at which water boils is 100.

The temperature at which alcohol boils with different water content is different, generally speaking, (standard atmospheric pressure) water is 100

The alcohol thermometer has the same construction as the mercury thermometer, except that it contains alcohol containing red dye. For ease of observation, this thermometer uses alcohol as the working substance. Because the boiling point (78) of alcohol is low and the freezing point is -117, alcohol thermometers are mostly used to measure low-temperature substances.

The working substance of kerosene thermometer is kerosene, which has a boiling point higher than 150 and a freezing point lower than -30So the kerosene thermometer has a measurement range of about -30 150Because the boiling point of alcohol is 78, the freezing point is -114

An alcohol thermometer can measure a lower temperature than a kerosene thermometer, but it cannot measure a temperature above 78. Judging from the range of temperature and orange degrees that are often measured in the middle school physics laboratory, kerosene thermometers are more suitable than alcohol thermometers. When a student sees that the scale of the thermometer is 100, but without analysis, Yuanqin says that the thermometer is an alcohol thermometer, which is wrong (the alcohol temperature is already boiling when it reaches 78, how can it have a temperature scale of 100).

At present, the thermometers with red working substances used in secondary school laboratories are generally kerosene thermometers, not alcohol thermometers.

Anonymous usersThe boiling point of alcohol is 78°C, but this is a value determined at atmospheric pressure. The air pressure inside an alcohol thermometer is usually greater than the standard atmospheric pressure.

Based on your description, you are wrong to say so.

The boiling point of alcohol is less than the maximum measured value of the thermometer and can be measured normally.

Only if the boiling point of alcohol is higher than the maximum measurement value of the thermometer, it cannot be measured, which is to ensure the safety of the use of the temperature shield hole meter. Pre-withered.