Why does gas have pressure?

Answer 1

A gas exerts pressure because it pushes on the walls of its container and the other gas molecules in the sample.

Molecular collisions between the gas molecules and those in the walls of the container are the means by which a force is exerted. The gas molecules move so fast that all of the collisions average out over time to create a constant pressure.

Answer 2

Gas has pressure because the gas molecules are in constant motion and collisions with the walls of a container create a force that exerts pressure. The more molecules present in a given volume, the higher the pressure will be.

Answer 3

Although gasses are usually never visible, they still have a mass. Gasses bounce around at different temperatures and pressures. Lets say you're blowing up a balloon, when you blow into the balloon you are releasing gasses into the balloon. The gasses begin bouncing around hitting the walls of the balloon at really high speeds. As you blow more air, it increases the number of gas molecules and therefore, how many are bouncing around, hitting the sides.

Answer 4

Gas exerts pressure because each molecule of the gas is zinging around with kinetic energy within a given area. When these molecules hit another molecule, such as the solid walls of a container, the kinetic energy is transferred from the gas molecule to the molecules of the wall and is recorded as pressure.

Answer 5

The atoms that make up a gas are in constant, random motion. This means that at all times, atoms of that gas are colliding with the walls of whatever container it's stored in, whether it's a balloon or other vessel. The average of all the collisions with the sides of the container is that gas's pressure. Heat up the container and the collisions increase because the atoms of the gas have more energy, and the pressure goes up.

Answer 6

How much pressure a gas exerts depends on the number of gas particles in a given space and how fast they are moving. The more gas particles there are and the faster they are moving, the greater the pressure they create.

Answer 7

Because the molecules in the gas are constantly flying and zipping around every

which way in all kinds of random directions at all kinds of random speeds. There are

always some of them bumping into the walls of the container, and all of those little

individual molecular forces add up to form what we perceive as pressure.

Answer 8

The rapid movement of particles is what causes the pressure. The amount of pressure a gas exerts is determined by how hard the gas particles slam against the side of the container. The harder the particles push, the more the pressure.

Answer 9

This is because all the molecules of a gas are in motion. This motion causes them to hit the sides of the container and the effect of these collisions is felt as the pressure exerted by the gas.

Answer 10

gases disperse to fill whatever container they occupy since gases are composed of Matt which takes up space.