Boiling the same amount of water with liquefied gas, lamp oil, and candles, which water will turn on

Your question should be preceded by a precondition to be properly compared and explained, which is faster to burn three substances of the same mass per unit of time, and to heat the same amount of water to boiling.

If you don't consider the adequacy of combustion, just look at the carbon-hydrogen ratio in the three substances, the higher it is, the less heat is released at the same mass, and vice versa (because the molecular weight of hydrogen is much smaller than carbon) If it is natural gas (methane), because of its carbon-to-hydrogen ratio, the heat released per unit mass per unit time is more, and if it is petroleum liquefied gas, if it is coal gas, because it contains carbon monoxide, the same mass combustion will not necessarily be more heat than the other two substances in the same time, Depends on the specific amount of carbon monoxide.

Liquefied gas: It's the fastest.

The gas stove uses liquefied gas, and the water is boiled quickly.

How slow it is to use lamp oil and candles!

The blue flame of liquefied gas, of course. The flames of oil lamps and candles are orange-red, indicating that the burning is not complete.

If you consider the degree of sufficiency of combustion, like.

Flashsimon said that the more fully the liquefied gas is burned, the more heat will be released per unit time, and vice versa (because the molecular weight of hydrogen is much smaller than carbon) such as natural gas (methane), because of its carbon-to-hydrogen ratio, when burning with the same mass, it will not necessarily be more heat than the other two substances released in the same time, depending on the specific content of carbon monoxide, if it is coal gas, it is to burn three substances of the same mass per unit time, to heat the same amount of water to boil, because it contains carbon monoxide, More heat is released per unit mass per unit of time, and the same is true if it is petroleum liquefied gas, which is faster.

If you don't consider the adequacy of combustion, just look at the ratio of carbon to hydrogen in the three substances, the higher it is, the less heat is emitted at the same mass, and your problem should be compared and explained correctly.

Large candles burn in water in a few different ways than small candles.

When a candle burns in water, the process of its burning is inhibited by water. When the spine burns in water, the heat and flame of the candle decrease. As a result, large candles may burn more slowly in water than smaller candles.

In addition, when a large candle is burned in water, it may burn less heat than a small candle because the large candle is more bulky, while when burning in water, the heat of the candle is limited by air leakage.

In general, large candles may burn more slowly than small candles in wild water, and they may burn less heat.

Fire and water have always been "incompatible", but candles can be lit in water. We can prove this to be true by doing an experiment. Find a large basin, first drop a few drops of candle oil into the basin, fix the candle in the middle of the basin, and then slowly pour the water into the basin so that the top of the candle is about a centimeter above the surface of the water.

Then, light the candles. As the candle burned slowly, the flame began to approach the water level, and the candle was not extinguished. After a few minutes or so, we will find a miraculous phenomenon:

The candle had burned underwater, and the flame had not been extinguished. Why is that? This is mainly due to the fact that during the burning process of the candle, the melted wax will quickly turn solid when it encounters water and freeze around the flame, forming a wax cylinder.

When the flame is below the water level, the water carries away the heat that is forcing on the wax cylinder. As a result, the wax cylinder protects the flame from burning.

The reason why you can't add water with a candle and can add water with gas is that a candle can't dissolve in water, but gas can dissolve in water. The main component of candles is actually paraffin wax, which is much lighter than water, so the melted liquid after paraffin wax is burned will float on the water, and then solidify again after being cold. And because paraffin wax is insoluble in water, it will be extinguished when it comes into contact with water.

However, the main component of coal gas is actually carbon monoxide, which is soluble in water, and water gas will be formed when it is dissolved in water. The main components of water gas become carbon monoxide and hydrogen, both of which are also flammable, so even if water is added to the gas, it is still flammable, and the gas can continue to burn.

In addition, when water is added to the gas, it will actually be cleaner, which is better from the perspective of environmental protection and safety. If water is not added to the gas, carbon monoxide leakage will cause great harm to the human body. However, if water is added to the gas, not only will it not change the flammability of the gas, but it will also be cleaner, and the carbon monoxide will dissolve in water, so that carbon monoxide leakage can be avoided.

At the same time, when carbon monoxide is dissolved in water, the gases produced by combustion are water and carbon dioxide. The water can quickly cool down the heat formed by the combustion of gas, and the water vapor formed can also form a protective film on the burning object, that is, form a barrier between the air. Then the burning object will not continue to expand.

From a clean point of view, a large amount of carbon dioxide is formed after gas is burned, and this combustion process increases carbon emissions, so this behavior will increase the greenhouse effect. However, if water is added to the gas, the carbon dioxide after combustion will be absorbed 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 does not affect the flammability of the gas, and it is also safer and more environmentally friendly.

Because adding water to the candle will affect the burning of the candle, but gas does not do this, so you can add water.

This is indeed a very obvious chemical common sense, because gas will produce water after burning, so it is said that you can use gas to add water, while candles only produce gas after burning.

It is also not possible to add water, because this will make the gas possible. It has a big impact on your own safety, so don't add water indiscriminately.

Hehe, candles are carbohydrates, that is, (CH2O)N, the main ingredient of candles is oil, and it is normal to produce water, the composition of candles and their combustion products, candles are usually made of paraffin. Paraffin wax is produced from the waxy fraction of petroleum by cold pressing or solvent dewaxing. Paraffin is a mixture of several higher alkanes, mainly n-dodosecane (C22H46) and n-octadecane (C28H58), containing about 85 carbon elements and 14 hydrogen elements.

Stearic acid (C17H35COOH) is also often added to candles to improve softness.

When the candle burns, the products of the combustion of n-docosane and stearic acid are carbon dioxide and water. The chemical equation for the reaction is as follows:

2c22h46 + 67o244co2 + 46h2oc17h35cooh + 26o218co2 + 18h2o

Because the candle is composed of paraffin wax, which contains hydrogen, according to the law of conservation of mass, the candle burns and reacts with oxygen in the air to form water.

This is the conclusion of experiments, which cover a burning candle with a dry, cold beaker with a mist of water on the inner wall of the beaker. So generate water. I wonder if the burning of the candle heats the air above, and the hot air meets the cold beaker and liquefies into water.

Candles are hydrocarbon-containing compounds, burned to produce carbon dioxide and water.

The raw material for candles is paraffin, which is extracted from certain distillates of petroleum, shale oil, or other bituminous mineral oils.

It is white or light yellow translucent, the main component is linear alkanes, and contains a small amount of branched alkanes, the linear alkane content varies from 75% to nearly 100%, each specific variety is composed of about 8-15 alkanes with different carbon numbers, and is an organic mixture. Organic matter contains oxygen, hydrogen, and carbon, and when burned, hydrogen molecules meet oxygen molecules to form water. Chemical Formula :

2H2+O2==Ignition==2H2O

Because the candle is composed of hydrogen.