Out of boiling and evaporation, which is a surface phenomenon ? Explain.

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Solution

Evaporation is a surface phenomenon.
Boiling once started occurs throughout the liquid.
Table for differences between evaporation and boiling:

Evaporation Boiling
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.
Evaporation usually occurs on the surface of the liquid being heated up. Boiling usually occurs on the entire mass of the liquid that gets heated up.
Bubbling effect is not visible in evaporation. Bubbling effect is visible during the process of boiling.
The process of evaporation is usually slower and more carried out when compared to boiling. The process of boiling is usually much quicker and the process happens quite rapidly as well.

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Similar questions

Q. Evaporation is a surface phenomenon. Explain.

Q. How boiling is a bulk phenomenon whereas evaporation is a surface phenomenon?

Why is evaporation called surface phenomenon whereas boiling is a bulk phenomenon?

Q. Consider the following statements carefully.
Statement-1: Evaporation is a bulk phenomenon and boiling is a surface phenomenon.
Statement-2: Gases can be liquefied by applying high pressure and low temperature.
Now, choose the correct option.

Evaporation is the change of liquid to the vapor state at any temperature below the boiling point of the liquid. Though both evaporation and boiling represent change of state, but these are different. Whereas evaporation occurs at all temperature, boiling occurs only at a specific temperature known as boiling point temperature. Moreover, evaporation is a surface phenomenon but boiling occurs throughout the liquid including its surface.

1. Why is cooling caused during evaporation ?
2. What is the name given to the process when liquid vapors are cooled ?
3. Is there any difference between gas and vapors ?
4. Why does alcohol evaporate faster than water ?

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Evaporation	Boiling
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.
Evaporation usually occurs on the surface of the liquid being heated up.	Boiling usually occurs on the entire mass of the liquid that gets heated up.
Bubbling effect is not visible in evaporation.	Bubbling effect is visible during the process of boiling.
The process of evaporation is usually slower and more carried out when compared to boiling.	The process of boiling is usually much quicker and the process happens quite rapidly as well.