Question

How boiling is different from evaporation.give two points.

Answer 1

Both boiling point and evaporation involve equating the vapor pressures of the ambient air and that of the liquid. 

molecules near the surface are able to gather enough kinetic energy (the heat of vaporization) to escape into the gas phase. 

1. 
Boiling point occurs throughout the liquid: all of the molecules (even the ones on the bottom) escape from the liquid phase to the gas phase. 

2. Boiling point occurs only when the liquid reaches a certain temperature.