since at boing condition of a liquid the vapour pressure is equal to external pressure than how the vapour can rise up how the vapourisation occurs??

Question

since at boing condition of a liquid the vapour pressure is equal to external pressure than how  the vapour can rise up how the vapourisation occurs??

anonymous · Answer

u mean excess pressure or external(atmospheric pressure)?

anonymous · Answer

external pressure... generally atmospheric

anonymous · Answer

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/vappre.html boiling point in a temperature

anonymous · Answer

at boiling point it just starts to boil howerver for escape of gas particles,the water vapour may escape with uniform speed leaving the system in equilibrium(no forces acting)

anonymous · Answer

but the presure due to vapours upward is equal to external pressur at boiling condition thn hw the vapours can escape .....

anonymous · Answer

isn't the force aplied by the vapour equal to force due to extrnal thn hw it will leave the place...

anonymous · Answer

|dw:1329317712004:dw|this is where things like excess pressure,purity of liquid and other phenomenon come into play