Candle in water
You should not believe that candles can burn in water. If you don't believe it, let me, a "little scientist", tell you.
As the saying goes: “Everyone loves radishes and green vegetables.” That day I saw an article in a book that said candles can burn in water. I found this ridiculous. Water and fire are natural enemies. How is it possible ? So I prepared the materials as the book says: a transparent glass, a candle and cold water.
Now that the materials are ready, you can start the experiment: first put cold water in the cup, fix the candle in the cup, and when it “holds” firmly, turn it on. The experiment has begun. I sat there and watched carefully. The flame burned slowly. After about 15 minutes the candle was flush with the water, at this time you should not cover your eyes, as it is eexactly like that. about to begin: the candle is not extinguished, it burns “peacefully”. Don't blink now, or you'll miss a miracle. After about 20 minutes, the candle burned to the middle of the water, and the small flame burned shakily, but you can rest assured that the flame will not go out.
Want to know why? Do not walk away, because at this point the candle has taken off its “clothes” – the wax shell. Now I can tell you why, because the candle is higher than the surface of the water. After lighting the candle, the inside and bottom of the candle body are heated, while the outside of the candle is filled with cold water. candle takes off her clothes. Thanks to the wax shell tightly surrounded by it, the candle can burn safely in water.
Now you should believe it! In fact, there are many, many reasons in life. If there is someonehe thing you think is impossible, you can do it yourself like me and experience the moment. Maybe the secret lies in that. Let's love science, learn science, use science and be little masters of science. I think you will benefit a lot from it.
What is the physical phenomenon when water and oil candles are put together?
You can't add water with candles, but you can add water with gas. The reason is that candles cannot be dissolved in water, but gas can be dissolved in water. The main component of candles is actually paraffin. The density of paraffin is much lighter than that of water, so the melted liquid after burning the paraffin will float on the water, and then solidify again after being cooled. And since paraffin is insoluble in water, it will burn on contact with water.
But the compThe main component of coal gas is actually carbon monoxide. Carbon monoxide is soluble in water. When coal gas dissolves in water, it forms water gas. The main components of aquatic gas become carbon monoxide and hydrogen. Both of these substances are also flammable. Therefore, even if water is added to the gas, it remains flammable and the gas may continue to burn.
And after adding water to the gas, it will actually be cleaner, which is better from an environmental and safety perspective. If water is not added to the gas, carbon monoxide leakage will cause serious harm to the human body. However, if water is added to the gas, it will not change the flammability of the gas, but it will also be cleaner. Carbon monoxide dissolves in water, preventing carbon monoxide leaks.
At the same time, the gases produced when the monCarbon monoxide is dissolved in water and burned are water and carbon dioxide. Water can quickly cool the heat generated by gas combustion. At the same time, the water vapor formed can also form a protective film on the burning object, which means that it forms a barrier between the air. Then burning objects will not continue to grow.
From a clean point of view, a large amount of carbon dioxide will be formed after the combustion of coal gas. This combustion process will increase carbon emissions, so this behavior will worsen the greenhouse effect. But if water is added to the gas, the burned carbon dioxide will be absorbed and covered by the water, and the carbon dioxide emissions released into the air will be reduced, which can also play an environmental role. Therefore, adding water to the gas will not affect the flammability of the gas, and it is also safer and more environmentally friendly.ironically.
1. It depends on the situation. If you put oil and candles in water, the result is obvious. I won't say more.
2. In fact, candles are also a kind of grease. When a candle burns, there is first a solid which melts and turns into a liquid. Under the heating of the flame, the liquid turns into a gas. What actually burns is gas, including our usual burning of wood. The principle is the same. If water is added to a candle, the vaporization of the water will affect the spatial distribution of the candle's gas molecules, which will appear as splashing flames accompanied by sound.