what is difference between evaporation and boiling?
Answers
Evaporation is the changing of a substance to Gaseous State from its Liquid State even before reaching its boiling point. It happens all the time through the energy obtained from the surroundings. It is slow as compared to boiling whereas,
Boiling is the process of heating a substance so that it changes to its gaseous form. Energy has to be provided to the liquid in this phenomenon. The energy provided keeps getting utilized in changing the state, therefore the temperature remains stable. It is much faster than evaporation.
Answer:
Evaporation - Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. The surrounding gas must not be saturated with the evaporating substance. When the molecules of the liquid collide, they transfer energy to each other based on how they collide with each other.When a molecule near the surface absorbs enough energy to overcome the vapor pressure, it will escape and enter the surrounding air as a gas.When evaporation occurs, the energy removed from the vaporized liquid will reduce the temperature of the liquid, resulting in evaporative cooling.
Boiling - Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere. There are two main types of boiling: nucleate boiling where small bubbles of vapour form at discrete points, and critical heat flux boiling where the boiling surface is heated above a certain critical temperature and a film of vapor forms on the surface. Transition boiling is an intermediate, unstable form of boiling with elements of both types. The boiling point of water is 100 °C or 212 °F but is lower with the decreased atmospheric pressure found at higher altitudes.