What is the temperature at which various liquids are liquefied and vaporized 30

Various liquids or gases have the potential to liquefy or vaporize at a variety of temperatures.

This is related to the temperature and ambient pressure of liquids and gases.

Take water, for example: at standard atmospheric pressure.

Below, the boiling point of water is 100, and the water will be vaporized in large quantities, but in the case of low pressure, the boiling point of water is not 100, and even the water whose pressure drops to a certain degree of zero can also boil directly, that is, the boiling point of water will decrease with the pressure.

Water molecules when the liquid does not reach its boiling point.

It will also become water vapor through movement, that is, evaporation, which is also part of liquid vaporization. Evaporation can occur at all temperatures when the liquid is in its liquid state.

Liquefaction is the reverse process of gasification, the liquid in the gasification at the same time continues to liquefaction, when we see that the liquid continues to become gas, it is because the speed of gasification is greater than the speed of liquefaction, vice versa is less than the speed of liquefaction.

1. Vaporization refers to the change of a substance from a liquid state to a gaseous state.

There are two ways: boiling and evaporation.

2. Liquefaction refers to the change of a substance from a gaseous state to a liquid state.

The landlord asked "what is the temperature of liquefaction and vaporization of various liquids?" and asked if he wanted to ask about the boiling point of liquids.

If you ask about the boiling point, it's not good.

The boiling point of the same liquid is different under different air pressures, and the boiling point of different liquids at the same pressure is also different, which is the physical property of each liquid.

Wow, how many kinds of liquids are there in the world, how many are you asking me to write?

Various liquids or gases have the potential to liquefy or vaporize at a variety of temperatures.

This is related to the temperature and ambient pressure of liquids and gases.

Take water as an example: at standard atmospheric pressure, the boiling point of water is 100, and the water will be vaporized in large quantities, but in the case of low pressure, the boiling point of water is not 100, and even the water whose pressure drops to a certain degree of zero can be boiled directly, that is, the boiling point of water will decrease with the pressure.

When the liquid does not reach the boiling point, the water molecules will also turn into water vapor through movement, that is, evaporation, which is also part of the vaporization of the liquid. Evaporation can occur at all temperatures when the liquid is in its liquid state.

As everyone knows. The process of the same substance changing from gaseous state to liquid state and from liquid state to gaseous state is the opposite process, and water is still taken as an example. As can be seen from Figure 1, the liquefaction temperature of water vapor is 100 at 1 standard atmosphere, and the saturated water vapor pressure of water vapor below 100 (including 100) does not exceed 1 standard atmosphere, and its upper limit is 1 standard atmosphere.

At 1 standard atmosphere, boiling occurs when the saturated vapor pressure of the water is equal to the external pressure, so the state fe segment indicates that the water is in a boiling state. Obviously, at one standard atmosphere, the liquefaction temperature of water vapor and the boiling point of water are both 100.

In the standard state, oxygen becomes a pale blue liquid at a temperature of -183 degrees Celsius and a snowflake-like pale blue solid at about -218 degrees Celsius; -253 for hydrogen; When nitrogen is cooled to a standard atmospheric pressure, it becomes a colorless liquid, and when it is cooled, liquid nitrogen becomes a snow-like solid; The critical temperature of helium is a 268; CO2 is different, above zero degrees, you need to increase the pressure, minus 20 degrees, 2 MPa faster, 29 degrees 7MPa more, zero degrees; Methane is about -160 degrees; Ammonia is at atmospheric pressure. (Note: If normal pressure is not indicated, it may need to be pressurized).

The heat of vaporization of water is kilojoules and is equivalent to 2260 kilojoules. In general: it takes five times as much heat to evaporate water at its boiling point as it does to heat the same amount of water from 1 to 100. The heat of vaporization is a physical property of a substance.

The temperature of water vapor liquefaction into water should be below 100 degrees Celsius. Because 100 degrees Celsius is the boiling point of water vapor. Below the boiling point, the gas liquefies.

Therefore, the temperature of water vapor liquefaction into water should be below 100 degrees Celsius. But if you are in the highland area, the temperature of liquefaction is lower.

Liquefaction refers to the process of changing a substance from a gaseous state to a liquid state, which will release heat to the outside world. There are two ways to achieve liquefaction, one is to reduce the temperature, and the other is to compress the volume. The critical temperature is the maximum temperature at which a gas can liquefy.

Because usually the volume of gas liquefaction will become one thousandth of the original, which is convenient for storage and transportation, so in reality, some gases (such as ammonia and natural gas) are usually liquefied, because the critical point of these two gases is higher, so it can become liquid under pressure at room temperature, and the critical point of some other gases such as hydrogen and nitrogen is very low, and deep cooling must be carried out while pressurizing, which is called liquefaction.

Water vapor, or water vapor for short, is the gaseous form of water (H2O). When water reaches its boiling point, it turns into water vapor. When the water vapor is below the boiling point, the water vapor becomes liquid water again.

The temperature of water vapor liquefaction into water should be below 100 degrees Celsius. Because 100 degrees Celsius is the boiling point of water vapor. Below the boiling point, the gas liquefies. Therefore, the temperature of water vapor liquefaction into water should be below 100 degrees Celsius.

Liquefaction refers to the process of changing a substance from a gaseous state to a liquid state, which will release heat to the outside world. There are two ways to achieve liquefaction, one is to reduce the temperature, and the other is to compress the volume. The critical temperature is the maximum temperature at which a gas can liquefy.

Because usually the volume of gas liquefaction will become one thousandth of the original, which is convenient for storage and transportation, so in reality, some gases (such as ammonia and natural gas) are usually liquefied, because the critical point of these two gases is higher, so it can become liquid under pressure at room temperature, and the critical point of some other gases such as hydrogen and nitrogen is very low, and deep cooling must be carried out while pressurizing, which is called liquefaction.

Water vapor, or water vapor for short, is the gaseous form of water (H2O). When water reaches its boiling point, it turns into water vapor. When the water vapor is below the boiling point, the water vapor becomes liquid water again.

To liquefy a gas, it is usually necessary to keep the temperature of the gas below the liquefaction temperature. Liquefaction temperature refers to the temperature threshold at which a gas becomes liquid, and each gas has its own liquefaction temperature. At atmospheric pressure, the temperature of the gas to become liquid requires a decrease in temperature to slow down the movement of gas molecules, so that the interaction force between gas molecules becomes dominant, making the gas become liquid.

However, there are some special situations where the gas can liquefy at temperatures higher than its liquefaction temperature. This usually requires increasing the pressure of the gas spine to change the phase state of the gas by increasing the pressure. In this case, even if the temperature is higher than the liquefaction temperature and the pressure of the gas is high enough, the interaction forces between the gas molecules can still dominate, turning the gas into a liquid.

This is known as supercritical liquefaction and is commonly found under certain gas and high-pressure experimental conditions. In general, in general, for a gas to liquefy, it is necessary to keep the temperature below the liquefaction temperature.

Summary. Liquefied petroleum gas is a mixture of a variety of hydrocarbons, basically a mixture of carbon three and carbon four, and a small amount of carbon five, according to product standards, the content of carbon three in liquefied petroleum gas should not exceed 80%, so the liquefaction temperature at atmospheric pressure should be based on the most difficult to liquefy carbon three, that is, according to the liquefaction temperature of propane to measure, my impression seems to be -30.

What is the liquefaction temperature of LPG? The pressure is constant!

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Liquefied petroleum gas is a mixture of a variety of hydrocarbons, the basic stove is a mixture of carbon three and carbon four, and a small amount of carbon five, according to product standards, the content of carbon three in liquefied fossil hidden oil and gas should not exceed 80%, so the liquefaction temperature at atmospheric pressure should be based on the most difficult liquefied carbon three, that is, according to the liquefaction temperature of propane to measure, I have the impression that the state cherry seems to be -30.

Vaporization – Definition: The phenomenon of a substance changing from a liquid phase to a gaseous phase.

Therefore: 1. You can use any substance in any state (temperature and other environments), as long as it can keep the liquid state (the premise of your shouting).

2. Now theoretically, the molecular bonds of liquids can be broken (similar to volatilization), and gases can be formed after disconnection, even if they are not in an ordinary state.

3. The conditions of the premise of non-seepage silver Zheng Xiang can be changed to make the above thesis valid.

I hope that there will be a correction supplement for children's shoes related to physical chemistry and related majors.

A liquid can turn into a gas at any temperature, but only if it is liquid; One cup at minus degrees Celsius; Gradually, it will solidify into a solid;

After the water stool celery curdles are bent and solidified, it will still turn into gas; But this is not called vaporization, but sublimation.

The change of substance from liquid to vapor is called vapor deficiency. There are two different ways of vaporization, namely evaporation and boiling. Boiling is required to bring the liquid to the boiling point, whereas evaporation is a phenomenon that can occur in liquids at any temperature. Sprinkle the water on the slippery cavity, over one.

100 degrees Celsius.

The temperature of water vapor liquefaction into water should be below 100 degrees Celsius. Because 100 degrees Celsius is the boiling point of water vapor. Below the boiling point, the gas liquefies.

Therefore, the temperature of water vapor liquefaction into water should be below 100 degrees Celsius. Liquefaction refers to the process of changing a substance from a gaseous state to a liquid state, which will release heat to the outside world. There are two ways to achieve liquefaction, one is to reduce the temperature, and the other is to compress the volume.

The critical temperature is the maximum temperature at which a gas can liquefy.