differentiate between evaporation and boiling
Answers
Answer:
What is Evaporation?
Take a beaker and put water in it. Now put this beaker on the flame and keep heating it. After some time, you will notice that water starts boiling and changes into vapor. This phenomenon is called vaporization. Now have you noticed that if a glass of water falls on the floor and no one wipes it but still after some time it dries. In the same way wet clothes dry up after some time. Do you know how? Well as we know that particles of matter are always moving and are never at rest it means they possess different amounts of kinetic energy at different temperatures. In the case of liquid as well a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of attraction of other particles and gets converted into vapors. This phenomenon of change of a liquid into vapors at any temperature below its boiling point is called evaporation.
What is Boiling?
Boiling is the rapid vaporization of the liquid when it is heated to its boiling point. For example, when we heat water up to 100℃ at sea level, it starts boiling and converts into vapor. Boiling water is used to kill microbes present in it and to make it soft. It is used in several cooking methods as well.
In the boiling process, vapor pressure of the liquid can overcome atmospheric pressure. That’s why bubbles can form and rise upwards in boiling.
What is Boiling Point?
The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor. Boiling point of a substance can vary according to the surrounding environmental pressure. A liquid at higher pressure has a higher boiling point and at lower pressure has a lower boiling point for example, at sea level water boils at 100℃ while at higher altitudes where the atmospheric pressure is lower water boils at lower temperature than 100℃.
Answer:
Evaporation is a normal process that occurs when the liquid form changes into the gaseous form; while causing an increase in the pressure or temperature. Boiling is an unnatural process where the liquid gets heated up and vaporized due to continuous heating of the liquid.