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The attributes that can be seen or felt are commonly used to characterize the states of matter. A solid is anything that feels hard and keeps its shape; a liquid is something that feels moist but doesn’t keep its shape. A gas is a type of matter that has the ability to change shape and volume.
A gas is a state of matter that has no discernible shape or volume. The density of other states of matter, such as solids and liquids, is lower than that of gasses. Between particles with a lot of kinetic energy and aren’t very attracted to one another, there’s a lot of free space. Gas particles move quickly and collide, causing them to diffuse, or spread out, until they are evenly distributed across the container’s volume.
There are terminologies used in the Gasses State of Matter, which are given below:
What is gas
Even in the presence of gravity and regardless of the amount of substance in the container, a gas is a sample of matter that conforms to the shape of the container in which it is contained and achieves a uniform density inside the container. Gaseous substance, often known as vapor, will disperse into space if it is not contained. The term “gas” can also refer to the state or condition of substance that possesses this attribute. When a gaseous sample of matter is heated, the atoms and molecules gain kinetic energy and travel faster. The atoms or molecules in a sample of gaseous substance lose kinetic energy and travel more slowly when it is cooled. When a sample of gaseous substance is heated in a container of a certain size, the pressure rises. In the above (figure 1) we can see, Gasses are widely spread and randomly ordered particles that are easily squeezed or squashed. A gas’s particles have enough energy to overcome the forces of attraction between them, allowing them to travel freely in any direction. Gas Particles in a gas move in a straight path all the time. The molecules are significantly farther apart and can freely move around since their kinetic energy surpasses the attraction force between them. Examples: Gasses such as nitrogen, oxygen, and carbon dioxide make up the Earth’s atmosphere. Air, oxygen, and helium are examples of gasses.The Laws of Gas
A gas’s volume is inversely related to its pressure and directly proportional to its temperature and volume. Boyle’s law states that the volume of a gas sample is inversely proportional to pressure, Charles and Gay-law Lussac’s states that the volume of a gas is directly proportional to its temperature at constant pressure, and Avogadro’s law states that the volume of a gas is directly proportional to the number of moles of gas.Characteristics of gasses
The following are some of the general characteristics of gasses:- The form of gasses is not predetermined. Gasses seep through the cracks and crevices of whatever container they’re in.
- There is no such thing as a fixed volume for glasses. Gasses, unlike liquids, expand across a surface unless they are forcibly stopped. This phenomena explains why you can often smell small old ladies wearing too much perfume before you see them.
- Gasses freely mix with one another. Unlike liquids, which may or may not mix (for example, oil and water), any mixture of gasses will always mix.
- Compressing gasses is simple. You can easily crush down the molecules in a gas since there is so much space between them.
