At what degree can alcohol ignite?

Concentration 100% ethanol.

The ignition point is 75 degrees Celsius.

The lower the concentration when mixed with water, the lower the ignition point.

Mixed with flammable substances, depending on the situation, the ignition point of alcohol is very low, it burns quickly, and the boiling point of alcohol is only 78 and the boiling point of water is 100oC

Flash point Substance Flash point Ethanol 100% 12 Propanol 23 Water-alcohol mixture 80% alcohol isopropanol.

12 60% alcohol ethyl ester -20 40% alcohol benzene -12 20% alcohol ethyl acetate.

2 10% alcohol n-pentanol 55

Ethanol 100% at 12 degrees Celsius.

Water-alcohol mixture: 80% alcohol at degrees Celsius.

Volume fraction) 60% alcohol degree Celsius.

40% alcohol degrees Celsius.

20% alcohol degrees Celsius.

10% alcohol at Celsius.

Question 1: What is the temperature of alcohol when it burns The temperature of an open flame is about 400 degrees to 800 degrees. Substances are generally burned in the form of gases.

That is, a liquid or solid is sublimated into a gas at a high temperature for combustion. When alcohol burns. The temperature is kept at the boiling point of the alcohol.

Evaporation continuously absorbs heat and keeps the temperature constant).

Question 2: The temperature of the fluctuating ridge of alcohol combustion, the highest temperature can reach many degrees, and the lowest temperature can reach many degrees? The highest is 600 degrees, the lowest is 400 degrees.

Question 3: Can the combustion temperature of alcohol be reduced to tens of degrees Celsius so as not to burn people's hands 20 points The combustion that Jian Hao usually talks about is a violent oxidation process of objects, which requires the following: to reach the ignition point, oxygen, and combustibles.

Under normal circumstances, the ignition point of alcohol does not change, and the flame temperature produced by oxidation is the same.

But there is a little "magic" that can make the alcohol burn without burning: mix the alcohol with a lot of water, soak the mixed solution in something like a handkerchief, and set it on fire. At this time, the handkerchief will not be burned during the burning process, this is because of the burning:

1, The handkerchief is not above the flame, but at the bottom, 2 The water will steam the hair of the hall and take away the heat from the handkerchief.

This process is more dangerous, so children should not try it randomly.

Question 4: How many degrees does alcohol burn Ignition point (ignition point) - gases, liquids and solid combustibles coexist with air, and when they reach a certain temperature, they will burn spontaneously when they come into contact with the fire source. The lowest temperature at which the ignition source can continue to burn after the ignition source is removed becomes the ignition point of the substance.

Ethanol 100% at 12 degrees Celsius.

Alcohol mixture:

80% alcohol degrees Celsius.

60% alcohol degrees Celsius.

40% alcohol degrees Celsius.

20% alcohol degrees Celsius.

10% alcohol at Celsius.

Question 5: How to properly extinguish the fire when alcohol burns, and what is the maximum temperature of alcohol combustion The temperature of liquid alcohol combustion is 500-600 degrees.

The density of alcohol is smaller than that of water, so the alcohol will float on the surface of the water and burn, but the effect of reducing the temperature and preventing the fire from spreading with a wet towel can be achieved with a wet towel.

Or cover it with sand ...

When the concentration reaches 60%, it can be ignited 100% directly.

I once asked students to mix alcohol and water in different proportions, pour it into a shallow vessel, and then use a match to light a fire directly above the vessel to see if it burns, and the result is that the alcohol can only be ignited directly if the volume concentration is about 41% or more. If the paper is dipped in alcohol, the concentration of ignition can be further reduced, and the higher the alcohol concentration, the easier it is to ignite.

50 degrees is fine, you have no problem with 60 degrees.

You can light it with 45 degrees, but you have no problem with 60 degrees.

The ignition point of alcohol is 75 degrees Celsius.

The ignition point of 100% alcohol is 75 degrees Celsius, and the lower the concentration when mixed with water, the lower the ignition point. Mixed with flammable substances, depending on the situation, the ignition point of alcohol is very low, it burns quickly, and the boiling point of alcohol is only 78 and that of water is 100.

Detailed physical properties of alcohol

Weakly acidic (strictly speaking, wax is acidic, can not discolor the acid-base indicator, and cannot chemically react with the alkali), because it contains polar oxygen-hydrogen bonds, it will generate alkoxy anion and protons when ionized.

The pka= of ethanol is similar to that of broad laughing water. Ethanol is weakly acidic, but the ionization equilibrium is present enough to allow the isotope exchange between it and heavy water to proceed rapidly.

Ethanol is reductive and can be oxidized to acetaldehyde. Ethanol can also be oxidized to acetic acid by potassium permanganate, while potassium permanganate changes from purplish-red to colorless. Ethanol can also react with acidic potassium dichromate solution, when the ethanol vapor enters the silica gel containing the acidic potassium dichromate solution, the silica gel can be seen to change from orange-red to gray-green (CR3+), this reaction can be used to test whether the company is drunk and driving (drunk driving).

The ignition point of alcohol, that is, the flash ignition point is 12 (opening), and the flash ignition point of 75% medical alcohol (the lowest temperature at which the mixture is in contact with the flame for combustion) is about 22 °C, and the fire hazard belongs to Class A, so do not spray alcohol with a watering can when disinfecting at home.

If you encounter an open flame such as smoking, cooking, or even static electricity on your clothes, it may cause fire** and other dangers. The correct way to do this is to wipe our shoes, mobile phones, handrails, doorknobs or mop the floor with a cotton towel or cloth dipped in alcohol.

First of all, the ignition point has nothing to do with the ignition point, and some solid fuels do not need to be melted when burned, such as coal, and coal can indeed be melted.

Ethanol has a ignition point of 363 degrees, and I clarify that this 363 degrees is the ignition temperature, not the ignition point. Simply put, it is the temperature at which spontaneous combustion (self-combustion) occurs in the absence of an external ignition source.

There are several conditions for an object to ignite:1Must be combustible (although it's nonsense, I'll list it anyway so as not to have a bar. ）；2.The temperature of the object is known to reach the ignition point; 3.Meet the chemical conditions of the combustion reaction, such as the presence of oxygen and so on.

The ignition point refers to the temperature at which combustion occurs in the presence of an external ignition source, and the ignition point of ethanol is indeed 75 degrees, which is not a problem.

The ignition point is the ignition point, which is 363°C, and at this temperature it will burn by itself. The flash point is 12 degrees Celsius, and at an ambient temperature of 12 degrees Celsius and above (air temperature, room temperature), it can be ignited with fire. The flash point of 75% medical alcohol (the minimum temperature at which the mixture burns in contact with the flame) is around 22°C.

The flash point of 40% alcohol is °C.

Solid alcohol has the same ignition point as liquid alcohol. But it depends on the concentration of alcohol: ethanol 100% 12 degrees Celsius alcohol mixture:

80% alcohol 60% alcohol 40% alcohol 20% alcohol 10% alcohol Celsius".

Theoretically, pure alcohol has a ignition point of 75 degrees Celsius. But it's actually not so easy to catch fire. Cigarette butts with 95% purity alcohol are commonly used for smoking. The surface temperature of the cigarette butt is 300 degrees, and the center is 700 degrees.

Theoretically, pure alcohol has a ignition point of 75 degrees Celsius.

75% alcohol has a minimum ignition point of 22°C

degree of wine can be ignited. Under the premise that there is no open flame, the spontaneous combustion temperature of alcohol is 323 degrees Celsius, and if it exceeds 323 degrees Celsius, it will spontaneously combust. For alcohol, when the alcohol content in the air reaches 19% and the temperature is above 12, it will burn when it encounters Mars, and even happen**.

2. The ignition point of concentration 100% ethanol is 75 oC, the lower the concentration of mixed with water, the lower the ignition point, the lower the ignition point of the combustion substance mixture, depending on the specific situation, the ignition point of the alcohol is very low, it ignites quickly, and the boiling point of alcohol is only 78, and the boiling point of water is 100oC.