Matter exists in three different states. One of the important states of matter is gas. It is totally different from that of the other two states of matter in terms of physical and chemical properties. To learn elaborately about gases and their different properties along with suitable examples, you can refer to this concept page developed by the experts of Vedantu. Here you will find the exact answer to the question of what is the meaning of gas. The proper explanation of the concepts with good examples will help you grab the concepts easily.
This page has been developed for those students who are willing to delve a little deeper into this chapter of chemistry and make their knowledge base stronger. It will also help students to understand the differences between a solid, liquid and gas. Even though we cannot see a gas, it still exists. We can perceive it either by our smell or by any reaction that triggers any of our senses. Keep on reading this page to seek more knowledge and gather more confidence by learning about gases.
The term gas denotes the particular state of matter where the molecules roam freely and can take the shape of any container in which it is kept. The molecules of this matter are packed slightly with a minimum intermolecular force between them. Due to the less binding force, gases do not have any particular shape. They can exist in any shape in an even way. Due to less intermolecular force between the gas particles, there is a huge space between them. This is why most of the gases are colourless and invisible. It is because of the huge amount of empty space between the gas molecules, this state of matter can be easily compressed using pressure.
Unlike solids and liquids, gases tend to acquire the entire space in which they are kept. As mentioned earlier, the gas molecules are not bound together with a huge intermolecular force, they can roam freely in space. This is why the gas molecules can travel to any portion of a container and fill it evenly. They also don’t have a definite volume or shape. They take the entire shape of the containers in which they are kept. There are many examples of gases you will find when you will study this chapter. If you consider the atmosphere blanketing our earth, you will find nitrogen, oxygen, hydrogen, carbon dioxide, etc. as the commonest examples of gases.
The atmosphere is the perfect example of gases. The air we breathe in can also be considered as a mixture of many gases. Gases can either be an element or a compound. In the modern periodic table, there are many elements that behave like gases but only 11 of them exist in this state in the standard temperature and pressure (STP). Those elements that exist in a gaseous state under 1 atmospheric pressure are called gases. Those 11 gases are Helium, Argon, Neon, Krypton, Radon, Xenon, Nitrogen, Hydrogen, Chlorine, Fluorine, and Oxygen. These are called pure gases as they are all elements. You can use these names as the perfect example of gas matter.
Now that you have learned what gases are, let us take a look into the differences between gases and the other states of matter.
Solids have a definite shape as the molecules are not free to move. A liquid can partially take the shape of a container but up to its level. Gases, on the other hand, can travel to the farthest corner of the container to fill it with their molecules.
Solids can be compressed to the slightest extent. Liquids can be compressed slightly but gases can be compressed to a huge extent due to the huge intermolecular space in between the particles.
Once you learn the different states of matter and their differences, you will also have to learn at least the 3 examples of a gas. This is the basic concept of matter that we study in the preliminary classes. Once we build a basic foundation, we then proceed to the next level to grab hold of the higher concepts in this aspect.
Learning the examples of gases will also help you figure out whether the matter mentioned in the question is gas or not. You can answer the questions related to the properties of gases too. This concept page developed by the experts of Vedantu will help you study the examples and the concepts related to them.
Q1. Why Can Gases Take the Shape of Containers?
If you study what is the meaning of gas properly, you will easily understand how the gas molecules are loosely bound to each other. They can spread easily and take the shape of the container without any hassle.
Q2. Why Can Gases be Compressed More than Solids and Liquids?
Gases have huge intermolecular spaces. It means that the molecules have ample space to cover when compressed.
Q3. Why are Most of the Gases Invisible?
Due to the huge intermolecular space, the density of the gases is very low. This is why they cannot be seen with our naked eyes.
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