a) Why does a gas exert pressure ?
(b) Why does a gas fill a vessel completely?
(c) Why are gases so easily compressible whereas it is almost impossible to compress a solid or a liquid?
Answers
Answer:
a) Because it is compressed in a vessel.
b) Because it has molecules so it is fully filled.
c)
There is no space between the individual particles, so they cannot pack together. The kinetic-molecular theory explains why gases are more compressible than either liquids or solids. Gases are compressible because most of the volume of a gas is composed of the large amounts of empty space between the gas particles.
Answer:
A: The pressure exerted by a gas is due to the random motion of particles in the gas. Gases have weak intermolecular forces and the particles in continuous random motion and these particles collide with the walls of the container. These collisions with the walls of the container exerts pressure on the gas.
Explanation:
B: Gases have a negligible intermolecular force of attraction between the particles of gas. As a result, the random motion of particles in all directions is experiencing in the vessel. Hence, the gas fills the vessel in which it is kept.
c: Gases are easily compressible as they have large inter-molecular spaces. The gas particles can come closer to each other when external pressure is applied on gases. On the other hand, it is almost impossible to compress a liquid because the intermolecular spaces in liquids are small.