What is the difference between inhaled air and exhaled air

According to the basic knowledge of chemistry in junior high school, the air inhaled is mainly composed of nitrogen, oxygen, and other gases, and the exhaled air is mainly composed ofCarbon dioxideand other ingredients.

It is important to note that the carbon dioxide content of exhaled breath is much higher than that of inhaled gasBoth the inhaled air and the exhaled air have oxygen and carbon dioxide.

The composition of air is not fixed, and as the altitude changes, the air pressure changes, and the proportion of air composition also changes. But air has long been considered a single substance.

It was not until later that the French scientist Lavoisier.

Experiments first led to the conclusion that air is composed of oxygen and nitrogen. At the end of the 19th century, scientists.

Through a large number of experiments, it was found that there are rare gases such as helium, argon, and xenon in the air.

The main difference is in the content of carbon dioxide, the exhaled air carbon dioxide content is higher, of course, people should increase the humidity of the inhaled gas when breathing, and prevent dust and so on from entering the lungs, to avoid lung damage, so if the air humidity is low, the humidity of the exhaled air will be higher, which is also the reason for the white fog produced by exhalation in winter.

1.Inhaled air contains more oxygen than exhaled gas;

2.Exhaled air contains more carbon dioxide than inhaled air; 、

3.The exhaled air contains more water vapor than the inhaled air (as you can see from the water vapor in your mirror).

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Problem description: Urgent. Analysis:

The difference between the air we breathe in and the air we exhale.

Inhaled air has a higher oxygen content than exhaled air, while the latter has a higher carbon dioxide content.

In addition, the latter also has a higher water vapor content (which is why I call it "gas" instead of "air"). Moreover, the temperature is not the same.

The proportion of nitrogen remains the same. Finally, there may be various dusts in the inhaled air, and the dust content of the exhaled air is significantly reduced to almost zero due to the filtration and retention of the respiratory system.

The oxygen content of the inhaled air is about 16% high, and the exhaled carbon dioxide is more than the exhalation, but the inhaled nitrogen content is the highest. It cannot be said that hail states inhale oxygen. The emission is carbon dioxide!

Through breathing, the gas used by inhalation is oxygen, and the exhalation is carbon dioxide.

Breathing is a very important life activity of the human body. The total process of organic matter in an organism undergoes a series of oxidative decomposition in the cell to finally produce carbon dioxide, uric acid or other products, and release energy, which is called respiration. Respiration is a chemical process in which organisms oxidize and decompose organic matter in cells to produce energy, and is a life activity that all animals and plants have.

The whole process of aerobic respiration in the human body can be divided into three stages:

In the first stage, one molecule of glucose is broken down into two molecules of pyruvate, which produces a small amount of reduced hydrogen (denoted by [h]) and releases a small amount of energy at the same time, which is carried out in the cytoplasmic matrix;

The third stage, the hydrogen produced in the first two stages, after a series of reactions, is catalyzed by enzymes and combines with oxygen to form water, and at the same time releases a large amount of energy, this stage is carried out on the inner membrane of the first chondria.

1.Take two empty gas collector cylinders and cover them with glass sheets, so that the two bottles of air are collected.

2.Fill two empty gas bottles with water, cover part of the bottle mouth with a glass sheet, and then slowly push forward to cover the bottle mouth (no bubbles should be left in the bottle), the glass piece covers the bottle mouth tightly, and then buckle it upside down in the sink. Blow air into the bottle with a straw until the bottle is filled with exhaled gas, close the bottle tightly with a glass sheet under water, and take out the bottle and place it on the table.

The same method collects the exhaled air from another bottle.

3.A few drops of clarified lime water are added to each bottle of air and a bottle of exhaled air and shaken. It was observed that there was no obvious phenomenon in the air cylinder, and the clarified lime water in the exhaled gas cylinder became turbid, indicating that the carbon dioxide content in the exhaled air was higher than that in the air.

4.The small wooden strips in the air cylinder remain unchanged and the small wooden strips in the exhaled gas cylinder are extinguished, indicating that the oxygen content in the air is higher than that in the exhaled air (and it can also indicate that the carbon dioxide content in the exhaled air is higher than that in the air).

5.Take two pieces of dry glass, put one in the air, blow on the other piece and find that the water mist on the glass piece is more than the one in the air, indicating that the content of water vapor in the exhaled air is higher than that in the air.

What is the difference between the air inhaled and the exhaled air in the laboratory, and the process is as follows:

Ask the question] What is the difference between the air we inhale and the air we exhale.

Hypothetical conjecture] The inhaled gas contains less carbon dioxide and water vapor; Exhaled air contains more carbon dioxide and water vapor.

Answer: (2) The lime water in the gas collection cylinder containing the exhaled gas becomes turbid, and there is no obvious phenomenon in the other bottle; There is more carbon dioxide in exhaled breath than in air;

3) The wooden strip in the gas collection bottle containing the exhaled gas is extinguished, and there is no obvious phenomenon in the other bottle; Exhaled air contains less oxygen than air;

4) Exhaled glass slice is wetter than another; There is more moisture in the exhaled air than in the air.

Clarified lime water, exhaled lime water becomes turbid, exhaled gas carbon dioxide content with spark, found exhaled gas fire strip immediately extinguished, exhaled gas in more carbon dioxide content of the above two experiments, carbon dioxide.

Hand hit, I don't know if it's right or not.

Preliminary research has been done in this area;

Refer to reading. Study of lung cancer markers in exhaled breath and its condensate and their detection methods.

The two bottles of clarified lime water A and B were introduced with the same amount of air and exhaled gas, and at the same time, the degree of turbidity in the bottle was greater, and the results showed that the bottle of exhaled air was obviously turbid. It indicates that the exhaled air of the human body contains more carbon dioxide.

The gas that a person inhales bai is.

DU oxygen, the exhaled breath is carbon dioxide.

Zhi in the oxidation of hydrocarbons, the DAO treatment of wastewater, rocket propellant version, and aviation, aviation.

Oxygen is needed for animals and humans to breathe during diving.

All animals breathe oxygen and exhale carbon dioxide during breathing.

The main pathways for CO2 production are as follows:

1. Organic matter (including animals and plants) can release carbon dioxide in the process of decomposition, fermentation, decay and deterioration.

2. Carbon dioxide should also be released during the combustion of oil, paraffin, coal and natural gas.

3. Petroleum and coal will also release carbon dioxide in the process of producing chemical products.

4. All manure and humic acid can also release carbon dioxide during fermentation and maturation.

Main uses of oxygen:

1. Chemical industry: In the production of synthetic ammonia, oxygen is mainly used for the oxidation of raw gas to strengthen the process and increase the output of chemical fertilizer. Another example is the high-temperature cracking of heavy oil and the gasification of pulverized coal.

2. National defense industry: liquid oxygen is the best accelerant for modern rockets, and liquid oxygen is also needed as an oxidant in supersonic aircraft.

3. Medical care: supply and respiration: used in hypoxia, hypoxic or anaerobic environments, such as: diving operations, mountaineering, high-altitude flight, astronautics, medical rescue, etc.

Breathing is the process by which the body inhales oxygen and exhales carbon dioxide.

When a person breathes, the exhaled air and the inhaled gas decrease, the exhaled air (oxygen) decreases, the carbon dioxide and water vapor increase, and the nitrogen remains the same.

1.Respiration is divided into aerobic respiration and anaerobic respiration, aerobic respiration is the consumption of oxygen to completely decompose glucose into carbon dioxide and water, anaerobic respiration in the human body does not consume oxygen, and glucose is broken down into lactic acid. Anaerobic respiration releases much less energy than aerobic respiration.

2.Generally, the simple point is to pass gas into clear lime water, and if the solution is turbid, there is carbon dioxide in the gas.

3.Put the sparkled sticks into the gas, and if the sticks rekindle, the gas will be oxygen.

4.The gas is passed into anhydrous copper sulphate, and if the copper sulphate turns blue, it contains water vapor.

Absorb external oxygen through respiration and remove carbon dioxide from the body at the same time, so the content of oxygen and carbon dioxide in the exhaled and exhaled air changes as follows: 1. The oxygen content in the exhaled air is higher than the oxygen content in the exhaled gas, 2. The carbon dioxide content in the exhaled gas is lower than the carbon dioxide content in the exhaled gas.

The basis for determining that the exhaled air contains nitrogen is that the air contains nitrogen, and nitrogen is not absorbed by the body.

The amount of oxygen in the exhaled air decreases, so the exhaled gas can make the burning wood stick burn less vigorously or even extinguish.

The gas that makes the clarified lime water cloudy is carbon dioxide, and the exhaled gas makes the lime water appear cloudy, proving that the exhaled gas is higher than the carbon dioxide in the air.

Exhaled air contains a lot of water vapor, which can form water droplets on the glass sheet.