Will toothpaste melt if burned in a fire for a long time?

Toothpaste is a complex mixture. It is usually made up of friction agents such as calcium carbonate.

Dicalcium phosphate, calcium pyrophosphate, silicon dioxide.

aluminum hydroxide), humectants (e.g., glycerin.

Sorbitol, propylene glycol, polyethylene glycol.

and water), surfactants (such as sodium dodecyl sulfate, sodium 2-acyloxy bond sulfonate, sodium lauroyl sarcosinate), thickeners (such as carboxymethyl cellulose, staghorn pectin, hydroxyethylcellulose, xanthan gum, guar gum, carrageenan, etc.), sweeteners (such as glycerol, sodium cyclohexylasulfonate, sodium saccharin, etc.), preservatives (such as potassium sorbate and sodium benzoate), active additives (such as chlorophyll, fluoride), and pigments, flavors, etc.

So many ingredients, if you look at them by mass fraction, can be divided into three major parts: water, friction agent, and other components.

Water vaporizes and volatilizes when heated; The friction agent is an inorganic component and is non-flammable, and whether it will melt depends on the composition of the specific friction agent and the temperature of your flame (for example, the melting points of the two crystal forms of calcium carbonate are 1,339 °C and 825 °C respectively, while the flame of the alcohol lamp is generally not higher than 500 °C, while the oxyalkyl flame can reach more than 2000 °C); The other components are almost all organic, which burns after the water has evaporated.

Although toothpaste has glycerin, all other ingredients are non-flammable.

It's just a matter of trying the fire, and the fire won't burn in the liquefied gas tank.

The fire will not burn in the liquefied gas tank, because the gas in the liquefied gas tank is pure propane, and propane cannot be ** if it is not mixed with air, but the gas tank must not close the valve first! Because if the air pressure of the liquefied gas tank is unstable, the fire will enter the liquefied gas tank and expand (not burn), which will produce negative pressure tempering**. The power of a household gas canister** is equivalent to 150 kg of TNT explosives!

But it's perfectly safe to put out the fire with a wet sheet and then close the valve.

Because the wax that the candle melts during the burning process, it quickly turns solid when it encounters water and freezes around the flame. However, when the flame is below the surface of the water, the water will quickly carry away the heat that is forcing on the wax cylinder, so the wax cylinder can protect the flame from burning.

Water plays a key cooling role so that candles close to the water do not melt due to the burning of the wick, so that the water is separated by the unburned wax layer, protecting the candle in the middle from continuing to burn until it reaches the bottom of the cup.

At the moment when the candle is blown out, a wisp of white smoke can be seen, and the white smoke can be lit with a burning match, which can rekindle the candle, so it can be proved that the white smoke is a solid tiny particle produced by the condensation of paraffin vapor.

Because the wax melted during the burning process of the candle will quickly turn solid when it encounters water, and then quickly freeze around the flame so that the candle can burn all the time.

As the fire goes out, the cup is like a thirsty and smoking throat, "drinking" the water in the plate, and the water that enters the cup will not flow out again. If you place a coin in the bottom of the tray beforehand, you can take it out without getting your fingers wet. Of course, when buckle the cup, be careful not to cover the coin with the rim.

Be careful not to put too much water in the dish, otherwise the cup may not be able to drink the water in the dish.

Principle: The candle burns and consumes oxygen, so that the pressure inside the glass is reduced, which is less than the atmospheric pressure outside, so the water will be pressed into the glass by the atmospheric pressure.

Because when the candle is burned, the paraffin wax that is melted on the outside of the candle condenses instantly when it encounters relatively cold water, so it will not continue to burn. The paraffin wax in the center of the candle has an outer layer of paraffin to block the water, so it will continue to burn with the flames. Theoretically, this experiment could completely burn out the paraffin wax in the center of gravity, i.e. turn the originally solid candle into a barrel.

Density of diamonds: 3The combustion temperature of 52g cm3 diamonds in the atmosphere is 850--1000, and the combustion temperature in pure oxygen is 720--800

Diamonds do not melt. But the open flame will disappear, if it is a large energy, it will be ** after a long time in the fire, so don't try, it will hurt people. Diamond does not encounter an open flame and will not melt in the case of general high temperatures, because its structure is stable rather than elemental stability, so it is best not to throw it into the fire, the composition of diamonds is carbon, diamond, graphite is also carbon, but the space of their atomic arrangement structure is different, resulting in a big difference in their melting point, hardness, appearance. Like graphite, the atomic arrangement is planar, and the plane is acted on by molecular forces, while the atomic arrangement of diamond, diamond is tetrahedral in space, and the atoms are acted on by atomic forces. The force of the atoms is much greater than that of the molecules, so it looks very the outside.

They can all be wound, but the temperature required for combustion is different.

The fire doesn't melt the diamond until 3550 -4000.

Diamonds are the hardest of the natural minerals, and they are also quite brittle, and they can still shatter when they are hit hard. Derived from the ancient Greek word adamant, which means hard and inviolable substance, it is recognized as the king of gemstones. Diamond's.

In other words, diamond is actually a fairly dense carbon crystal.

A carat, or carat, is a unit of mass for a diamond. One calorie is equivalent to 200 milligrams, and legend has it that the weight used by early diamond traders to weigh diamonds was the fruit of the rice bean tree (carob), and one such fruit weighed about 200 milligrams. Because diamonds are essentially the same density, the heavier the diamond, the larger the volume.

The larger the diamond, the rarer it is and the higher the value per card.

It is isolated from the air at thousands of degrees, and if it comes into contact with the air, it will ignite when it is put into a fire, which is essentially no different from burning charcoal, because its composition is charcoal. If you want to burn it, leave me two. Thanks, hehe....

Substances have melting points. For example, under standard conditions, the melting point of ice is zero, and it is difficult to separate impurities from the ice below zero. In the standard state, the melting point of ** is 1063 degrees.

The ancient charcoal fire alone could not separate the impurities in the **. "Real gold is not afraid of fire", this is the past saying, which shows that with the best fuel at that time, the burning temperature can not always reach the melting point. Now, it is not difficult to reach a high temperature of 3,000 degrees.

It depends on what the ** and the fire is, and the key is to see whether the temperature exceeds the melting point of gold; Second, see whether the pressure (impact force) generated in the process can deform it.

What fire? Exactly what it is, it's a different result.

Isn't real gold afraid of fire?

Fireworks can sometimes melt gold.

Ordinary fires will not reach the melting point of gold!

Yes

Aren't all the jewelry made up and refreshed?

The key is to see if the temperature exceeds the melting point of the gold.

Probably not, real gold is not afraid of fire.

The principle is that toothpaste contains phosphorus (if you use a toothpaste that does not contain phosphorus), it is easy to start a fire by rubbing quickly and adding cotton.

The methods of making a fire in the wild are:

1) Classical wood drilling fire method: this is the most widely understood, but also the most difficult method, find the right wood to do the drill board, dry poplar, willow is a good choice, its texture is softer, and then find the right branch to do the drill bit, relatively harder can, and then drill the edge of the drill plate out of the inverted "V" shaped groove, and finally put a flammable velvet or dead leaves under the drill board, and then drill hard with both hands until the fire is drilled;

2) Convex mirror ignition method: any convex mirror with a diameter of two inches or more (such as telescopes) can be used to gather the sun's rays in bright sunlight, so that it can be illuminated on the prepared ignition object, and the ignition can be ignited with a magnifying glass (convex mirror translude) through the sunlight to focus on the flammable ignition (rotten wood, yarn drawn from the cloth, dry bark torn into thin sheets, dry wood chips, etc.) to make fire;

3) Simple planer fire method: dig a long groove in the softwood board, place flammable velvet in front of the groove, and push it forward with a hardwood strip until the spark ignites the velvet;

4) Bowstring drilling method: Tie shoelaces, rope or belts with strong branches or bamboo pieces to make a bow. Wrap a dry stick around the bow and use it to quickly spin on a small piece of hardwood.

This will drill out black powder, which will eventually smoke and create sparks that ignite the ignition.

The principle is simple, friction generates heat. Further, why use laundry detergent, because laundry detergent contains phosphorus (if you can't use a laundry detergent that does not contain phosphorus), it is easy to start a fire with a quick rubbing. The landlord should know about phosphorus, if you don't know, check the "phosphorus" thing, it will be more clear.

Phosphorus is generally in the form of compounds as additives, so it is difficult to do, the paper and plant ash (K2CO3 catalytic combustion of sugars) kneaded, shake off the ash, at this time the paper is easy to be ignited by Mars, not thicker than the hair of the copper wire rolled into a very fine spiral, after the electricity (3 6a) can make the paper smoldering until completely exhausted.