explain the Following :
a) Gases exert pressure on the wall of container
b) Water is liquied at room temperature
c) Evaporation causes cooling ?
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(a) The Particles in gases are loosely packed and have high kinetic energy and due to this they move with a high speed in random direction due to this random motion of the particle they hit the walls of the container an thus, exert pressure.
2.It is because the freezing point of the water is less than the room temperature and also the boiling point of the water is very above the room temperature. This makes the water to exist in the liquid state.....
3.Evaporation causes cooling because water requires heat to evaporate so when it evaporates it take heat from surroundings which makes surrounding cooler....
HOPE IT HELPS ^_^
(a) The Particles in gases are loosely packed and have high kinetic energy and due to this they move with a high speed in random direction due to this random motion of the particle they hit the walls of the container an thus, exert pressure.
2.It is because the freezing point of the water is less than the room temperature and also the boiling point of the water is very above the room temperature. This makes the water to exist in the liquid state.....
3.Evaporation causes cooling because water requires heat to evaporate so when it evaporates it take heat from surroundings which makes surrounding cooler....
HOPE IT HELPS ^_^
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