How do gases exert atmospheric pressure

A siphon can be started by filling the tube with water perhaps by suction. Once started, atmospheric pressure upon the surface of the upper container forces water up the short tube to replace water flowing out of the long tube.

Boyle's Law:. In Robert Boyle made the first systematic study of the relationship between volume and pressure in gases. Boyle's observations can be summed up in the statement: At constant temperature, the volume of a gas varies inversely with the pressure exerted on it.

Figure 6. Observations about pressure may be explained using the following ideas. The rapid motion and collisions of molecules with the walls of the container causes pressure force on a unit area. Pressure is proportional to the number of molecular collisions and the force of the collisions in a particular area.

The more collisions of gas molecules with the walls, the higher the pressure. Introduction: Pressure is determined by the flow of mass from a high pressure region to a low pressure region. Boyle's Law: In Robert Boyle made the first systematic study of the relationship between volume and pressure in gases.

Kinetic Molecular Theory Explanation of Boyle's Law Observations about pressure may be explained using the following ideas. Because there is so much space between the particles in a gas, a gas is highly compressible. High compressibility and the ability of gases to take on the shape and volume of its container are two of the important physical properties of gasses. The air that we breath is mostly nitrogen and oxygen, with much smaller amounts of water vapor, carbon dioxide, noble gasses and the organic compound, methane Table 9.

A gas that is enclosed in a container exerts a pressure on the inner walls of that container. This pressure is the result of the countless collisions of the gas particles with the container wall. As each collision occurs, a small amount of energy is transferred, generating a net pressure.

Although we are generally unaware of it, the gasses in the atmosphere generate a tremendous pressure on all of us. The Earth's atmosphere is its outermost layer.

The atmosphere is a mixture of gases and extends about km above the Earth's surface. Scientists identify different layers of the atmosphere, according to the height above the surface and the properties of the gases there. The atmosphere exerts pressure on the Earth's surface and on objects placed in the atmosphere. This is called atmospheric pressure. However, this decreases as the height above the surface of the planet altitude increases.