Q3)a)A gas fill completely the vessel in which it is kept.b)Agas exerts pressure on the walls of the container.c)A wooden table should be called a solid.d)we can easily move our hand in air but to do the same through a solid block of wood we need a karate expert.
Answers
Answer:
a) Gas fills completely The vessel in which it is kept because the due to high kinetic energy and negligible forces of attraction the particles of a gas are moving with a speed in all directions and the gas completely filled The vessel in which it is kept..
b) A gas exerts pressure on the walls of the container because of High kinetic energy & negligible forces of attraction the particles of a gas move with high speed in all direction when the fast moving gas particles hit the walls of the container from inside they exert a gas pressure.
Hence, the pressure exerted by gas is due to the constant collisions of the fast moving gas particles against that inner walls of the container.
c) A wooden table should be called a solid because a wooden table is a rigid object having a definite shape and definite volume.
Since a wooden table has rigidity, definite shape & definite volume it should be called a solid.
d) Because it is a gas and the particles of gas are very far apart and they have a very weak forces of attraction between them . The extremely weak forces between the particles of air can be overcome easily due to which we can easily move our hand in air.
The particles of solid block of wood very closely packed and solid particles have a strong forces of attraction between them. So it needs are strong force to overcome the strong interparticle attraction of block of wood and break it apart by moving our hand which only a Karate expert can apply.
a) Kinetic energy possessed by gas particles is very high which allows them to randomly move across all directions when contained, hence the particles fills the gas vessel entirely.
b) Gas molecules possess high kinetic energy, due to which they are under constant motion inside the container in random directions which causes them to hit the walls of the container and hence create vibrations. These collisions with the walls of the container generate pressure.
c) A wooden table should be called a solid as it possesses all the properties of a solid such as:
◆ Definite size and shape
◆ Intermolecular attraction between closely packed particles.
◆ It is rigid and cannot be compressed
d) Molecules in gases are loosely packed as compared to solid molecules which are densely packed.
Hence we are easily able to break the force of attraction when we move our hand through air but find it difficult to break through a solid (because of greater forces of attraction between molecules) which a karate expert is able to smash with the application of a lot of force.