When you think of a flammable liquid, you probably imagine something that’s thin and volatile. After all, we associate liquids with being less dense than gases (for example, water is less dense than air). The word “gas” itself comes from the word “vapour”, meaning an easily evaporated substance. It just so happens that when we put ‘gas’ and ‘liquid’ together as words in the same sentence, they usually refer to substances that are lighter than air. But what if one particular type of gas isn’t lighter than air? What if it’s denser than air? Would it still be called a gas then? Read on to find out.
Is Gas Lighter Than Air?
No, gas is actually heavier than air. While the density of a gas varies depending on its temperature and pressure, it is always heavier than air. The reason why we are able to stay afloat on water is because the density of water is higher than that of air.
What Is The Reason Gas Is Not Lighter Than Air?
Gas is not lighter than air due to its density
When we talk about “lighter than air”, it is usually to refer to something that isn’t heavier than air. For example, helium balloons are lighter than air because they are made of helium gas, which is less dense than air. In the case of gas, however, the opposite is true: gas is denser than air. What this means is that while you can float on water because water’s density is higher than that of air, you cannot float in a room full of gas because the density of a room full of gas will be higher than the density of a room with just the bare minimum amount of oxygen in it. So what does this mean? It means that gases are denser than air and therefore heavier!
Gas can exist at extremely low temperatures and high pressures
The reason why we can see stars or moon at night or have candles burning in our living rooms is because of the extremely low temperatures and high pressures that exist in those places. If a gas were to exist in such a place, it would be denser than air and therefore heavier than air.
Gas can exist at extreme temperatures and pressures
The low temperatures and high pressures that occur in outer space are actually what we experience on Earth as well. For example, the temperature at the centre of the sun is around 15,000 degrees Celsius (27,000 degrees Fahrenheit). The pressure there is so high that it’s equivalent to a pressure of about 10 million times what we experience on Earth! This incredible pressure causes gases to behave in ways that are different from their behaviour on Earth. For example, when helium gas meets other gases, it forms a very dense liquid called dilute helium-4 or 4He (also known as liquid neon). It also causes certain types of materials to behave differently – for example, it causes diamonds to become even more hard.e. at extremely low temperatures and high pressures, it would be denser than air..e. at a very low temperature and high pressure, it would be so dense that it would be heavier than air.
Gases can exist in solids
Gases can also exist in solids. For example, helium is used to fill the balloons of our helium-filled party poppers, which are then lit using a match or lighter. These party poppers are made of solid rubber, which contains small amounts of helium gas bound to the rubber molecules by chemical bonds. Since the density of gases depends on their temperature and pressure, it’s possible that when the gas is compressed and heated up, it would become denser than air (i.e., heavier) and therefore heavier than the solid rubber itself!
Gases can exist in liquids
When we talk about liquids, we usually refer to solids that have been converted into liquids (such as water). However, there are also liquids that contain gases as well as other things.e. at extremely low temperatures and high pressures, it would be denser than air. Because of this, gases cannot exist at those temperatures and pressures because they will not be lighter than air.
Gas can exist in a vacuum
If a gas could exist in a vacuum, it would have to have a lower density than air if it were to be lighter than air. But gases are not even able to exist in vacuums, as there is not enough oxygen around for them to do so! This means that the density of gases cannot be less than that of air because they don’t even have enough oxygen around them to make their densities less!
What Are The Features Of Gas?
- It is a necessary product for the human body and it is produced by the process of fermentation.
- It is a lighter form of energy and it has more power than coal, oil, natural gas, and methane gas.
- It is also one of the most harmful products for humans as it can cause various diseases like cancer, lung disease, heart disease, etc.
- It can also be used as a fuel in place of coal or oil but this will have its own disadvantage too.
- The main source of production of gas is from plants which are dependent on the process of photosynthesis.
- Plants use carbon dioxide to make sugar and oxygen which is then produced by the process of photosynthesis and this oxygen comes out as a gas that we call air or oxygen gas etc.
What Are The Features Of Air?
- It is a highly effective form of air purification. It can remove almost all the germs and bacteria from the air, making it safe to breathe.
- It is non-toxic and non-irritating in nature, as it does not contain any harmful chemicals or harmful fumes.
- It works quickly, within seconds, so that you do not have to wait for several days before you can start breathing normally again.
- Air purifiers are usually very small in size and light weight; so they do not take up much space in your room or home and do not require a lot of electricity to run them on a regular basis.
- The air purifiers are very efficient in their job of removing germs and bacteria from the air, as they can remove at least 99.9% of all the germs and bacteria from your air.
- They are very easy to run, as they do not require any complex or expensive equipment to run them on a regular basis.
- Most of them come with a timer function, that lets you know when it has finished running and needs to be restarted again.
- They can be used in homes, offices, hospitals, and other public places where clean air is required for the comfort of your visitors or patients, or employees working at these places.
Summary
A gas is a substance that exists as a liquid or a vapour at room temperature and atmospheric pressure. Gases can be composed of any type of molecule, both organic and inorganic. Gases are also distinguished from liquids by the fact that they have no fixed volume. They will expand to fill any container in which they are held and are usually more volatile than liquids.
