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Why evaporation is the surface phenomena where as boiling is a bulk phenomena?
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∙ 10y ago
impossible hai re
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∙ 10y ago
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Why is evaporation called surface phenomenon whereas boiling is bulk phenomenon?
cos the boiling point 100 degree celcius
Why is boiling is called bulk phenomena?
During boiling the entire volume of the liquid is involved.
Why is evaporation a surface phenomenon whereas boiling is a bulk phenomenon?
Boiling occurs in bulk and at the boiling point; all of the liquid is hot enough that any additional energy will cause it to become a gas. Evaporation occurs at the surface and at a temperature under the boiling point, because only at the surface can the hotter components of the atomic or (usually) molecular components of the liquid escape from the liquid, when most of the liquid is not hot enough to change into the gas phase.
Are variables in evaporation?
For evaporation from a pure water surface, the rate of evaporation is proportional to the difference in vapor pressure between that of the water surface and that of the bulk air over it. The vapor pressure of water in turn depends on its temperature.
What is the difference between evaporation and boiling-?
The difference in evaporation and boiling is simple. Just imagine a beaker and being placed on the hot plate. The liquid it beginning to evaporate and the their is a gradient in the water because not all of the water is reaching 100 degrees Celsius at once. Some of it is beginning to evaporate (change in the state from a liquid to a gas) the other is beginning to boil! Remember boiling is a characteristic property and once it is reached the temperature doesn't continue to increase. Hope this helped!Vaporization if the phase change from a liquid to a gas. Evaporation and boiling are both mechanisms for vaporization to occur. Evaporation occurs at the surface of the liquid. It is the primary method by which water moves from bodies of water into the atmosphere. It is a much slower process than boiling. Boiling occurs when a liquid is heated to the boiling point. During boiling, water evaporates throughout the entire liquid very fast, rather than just at the surface.Evaporation happens only at the surface of a liquid and occurs at any temperature (so long as the substance is a liquid at that temperature). However, as most people are aware, liquids evaporates faster at a higher temperature. Boiling, on the other hand, happens throughout the bulk of a liquid, usually starting from some site on the inside of the container and rising in a bubble to the surface. It only happens when the temperature is above the boiling point of that substance.
Difference between evaporation and boiling?
The difference in evaporation and boiling is simple. Just imagine a beaker and being placed on the hot plate. The liquid it beginning to evaporate and the their is a gradient in the water because not all of the water is reaching 100 degrees Celsius at once. Some of it is beginning to evaporate (change in the state from a liquid to a gas) the other is beginning to boil! Remember boiling is a characteristic property and once it is reached the temperature doesn't continue to increase. Hope this helped!Vaporization if the phase change from a liquid to a gas. Evaporation and boiling are both mechanisms for vaporization to occur. Evaporation occurs at the surface of the liquid. It is the primary method by which water moves from bodies of water into the atmosphere. It is a much slower process than boiling. Boiling occurs when a liquid is heated to the boiling point. During boiling, water evaporates throughout the entire liquid very fast, rather than just at the surface.Evaporation happens only at the surface of a liquid and occurs at any temperature (so long as the substance is a liquid at that temperature). However, as most people are aware, liquids evaporates faster at a higher temperature. Boiling, on the other hand, happens throughout the bulk of a liquid, usually starting from some site on the inside of the container and rising in a bubble to the surface. It only happens when the temperature is above the boiling point of that substance.
What is the main difference between boiling and evaporation?
The main difference between boiling and evaporation is that boiling is much faster. Boiling also often takes place at the bottom of the fluid (where the heat source usually is) whereas evaporation takes place only at the surface. So boiling can produce bubbles, while evaporation doesn't.Evaporation is the process by which molecules in a liquid state (e.g. water) spontaneously become gaseous (e.g. water vapor), without being heated to boiling point. It is the opposite of condensation. Generally, evaporation can be seen by the gradual disappearance of a liquid, when exposed to a significant volume of gas.Boiling is very rapid evaporation starting within a container of water.Normally evaporation occurs at a much slower rate than boiling because most evaporation occurs with room temperature water.Boiling occurs only when the liquid is heated to the boiling point, and vapor bubbles come from the bulk of the liquid. In evaporation, vaporization occurs only at the surface of the liquid, not throughout the liquid, and this occurs at lower temperatures.
What are different between evaporation and boiling?
Boiling- i) It is a bulk phenomena.ii) The substance changes it's state only at it's boiling point.iii) It doesn't give a cooling effect.Evaporation- i) It is a surface phenomena.ii) The substance does not change only at it's boiling point.iii) It gives a cooling effect.EVAPORATIONevaporation takes place silentlyit takes place at all temp.its a natural processit takes place only on surfacerate of evaporation depends on area of free surfaceBOILINGits associated with characteristic soundits takes place at all temp.to be heated for boilingat constant temp. boiling takes placeboiling takes place at all regions of liquidit does not depend on free surface
What are the differences between boiling and evaporation?
Boiling- i) It is a bulk phenomena.ii) The substance changes it's state only at it's boiling point.iii) It doesn't give a cooling effect.Evaporation- i) It is a surface phenomena.ii) The substance does not change only at it's boiling point.iii) It gives a cooling effect.EVAPORATIONevaporation takes place silentlyit takes place at all temp.its a natural processit takes place only on surfacerate of evaporation depends on area of free surfaceBOILINGits associated with characteristic soundits takes place at all temp.to be heated for boilingat constant temp. boiling takes placeboiling takes place at all regions of liquidit does not depend on free surface
Why boiling is a bulk phenomenon?
when
Why boiling is called bulk phenomenon?
The degree to make boiling point
Why are boiling chips placed in distilling flask?
Because glass is very smooth, it is difficult for bubbles to nucleate on the surface. Boiling chips are added to provide a good surface for nucleation and vaporization of the liquid is more or less steady and continuous. Without them, the liquid can become superheated and boil somewhat explosively with superheated metastable regions of the liquid undergoing homogenous nucleation in the bulk of the liquid and rapidly expanding. Evaporation of the liquid occurs in somewhat random violent bursts.
