Question

why do gases exert pressure????

Answer 1

The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gasis due to the sum of all these collision forces.The more particles that hit the walls, the higher the pressure

Answer 2

hi frnd 

gases exert pressure as its molecules are freely packed unlike the solid and luquid ...
when the molecules hit against each other and the wall around it ....thts  when it exerts pressure /.....


hope it helps u 
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it was helpfull ...

ur frnd 
alwin