Evaporation is a natural process through which a substance changes its state from liquid to vapour. It is a continuous process as only its rate changes with different climatic conditions. Evaporation is a surface phenomenon. In evaporation vapour is being formed from the liquid.
Evaporation is a natural process that occurs with the help of heat energy provided by sunlight and results in the liquid to convert to gaseous form during the rise in pressure or temperature and liquid is heated up in boiling by an external medium i.e. we need to give proper energy externally for this process and because of the constant heating of the liquid, it is vaporized the liquid.
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As evaporation is a surface phenomenon, evaporation takes place on liquid’s surface. When being heated up generally through sunlight whereas boiling usually occurs within the whole body of the liquid or water that gets heated up. We can’t observe the Bubbling effect in evaporation but we can observe the Bubbling effect in the boiling process. In general, evaporation is a slow process as it depends on heat transferred due to sunlight and is more carried out when compared to boiling whereas The process of boiling is usually much faster and the process happens quite rapidly as well because we will provide external energy in this process.
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In our surroundings, there are many bodies of water like lakes, oceans, rivers, ponds, etc. If we provide heat to these bodies then what will happen! Simply we can say that water will get hotter or warmer I.e. there will be change in temperature and if the temperature increasing rapidly then a till coming when its state will going to be changed and at that point, we can observe that water is changing to vapour and moving upwards. That’s it changing of state of water from one form to another in the presence of heat or sunlight is called evaporation.
Or when liquid will turn into gas or vapour then it is known as evaporation. A common An example of evaporation includes water from soil that gets converted into vapour through the continuous heating effect of sunlight. Evaporation is a slow process and this process can occur without interference it’s boiling I.e. No need to attain boiling point for evaporation it can also occur below its boiling point
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We can easily observe examples of evaporation in our surrounding
Like when we dry clothes under the sunlight,
When we do ironing of clothes,
Ice cubes are melting due to evaporation,
In the formation of common salts, evaporation plays a very important role,
Evaporation of nail paint remover I.e. thinner
Evaporation is responsible for many drying activities like drying of hairs, drying of water bodies like oceans, lakes, rivers, ponds, etc.
In our body evaporation is the one who makes us feel cool due by converting sweat into vapour.
In comparison to boiling, we can easily observe that boing is a fast process. In this process, we heat a substance to attain its boiling point, at its boiling point the substance range its state from liquid to vapour generally. In boiling, there is a major role of boiling point as substance generally liquid must need temperature more that it’s the boiling point for this process. One more important difference between these two Is that evaporation is a surface phenomenon I.e. it will occur on the surface of a substance whereas boiling can occur through the entire mass I.e. large mass of the substance.
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NCERT Chemistry Notes:
Evaporation is a slow process in comparison with boiling because there is a limited supply of heat energy in evaporation and the boiling process, there is an excess or more supply of heat energy. Evaporation is a natural process whereas boiling is not a natural process. Evaporation is a continuous process but boiling is not continuous.
distinguish between boiling and evaporation | |
Evaporation:- | Boiling:- |
Evaporation is a natural process that occurs with the help of heat energy provided by sunlight and results in the liquid to convert to gaseous form during the rise in pressure or temperature. | Boiling is a process that occurs within the whole body of the liquid or water that gets heated up by an external medium I.e. We need to give proper hey energy externally for this process and the liquid is then because of the heating of liquid. |
Evaporation takes place on liquid’s surface as evaporation is a surface phenomenon when being heated up generally through sunlight. | Boiling usually occurs on the whole mass of the liquid that gets heated up. |
distinguish between boiling and evaporation | |
Evaporation:- | Boiling:- |
Evaporation is a natural process that occurs with the help of heat energy provided by sunlight and results in the liquid to convert to gaseous form during the rise in pressure or temperature. | Boiling is a process that occurs within the whole body of the liquid or water that gets heated up by an external medium I.e. We need to give proper hey energy externally for this process and the liquid is then because of the heating of liquid. |
Evaporation takes place on liquid’s surface as evaporation is a surface phenomenon when being heated up generally through sunlight. | Boiling usually occurs on the whole mass of the liquid that gets heated up. |
We can’t observe the Bubbling effect in evaporation. | We can observe the Bubbling effect during the process of boiling. |
The process of evaporation is usually slower as it depends on heat transferred due to sunlight and is more carried out when compared to boiling. | The process of boiling is usually much faster and the process happens quite rapidly as well because we will provide external energy in this process. |
In this way, we can differentiate between evaporation and boiling.
Evaporation is a natural process whereas boiling is a human-made process.
Evaporation will be done without a specific heating temperature. While boiling must need a specific temperature that is known as the boiling temperature of that substance is needed for this process.
In vaporisation, bubbling will not be observed but that in boiling bubbling will be observed.
An example of evaporation is oceans I.e. from oceans water continuously changes to vapour with the help of getting sunlight.
Another example is cloth drying in summer is mainly due to the evaporation process.
The evaporation process is always active, it may be in low sunlight conditions or at night. Only its rate will be affected as in presence of more sunlight more heat energy will be used by a substance to change its form and this is the main reason why evaporation is more carried out concerning boiling.
Evaporation is a natural and continuous process and it can happen below its ( substance we use to evaporate ) boiling point. In this process, we will not observe bubbles because here energy is transferred in a limited quantity but a case of boiling bubbling will be observed because in this process more than sufficient energy is given to the substance. Boiling is quicker than evaporation due to energy supply.
We can easily observe that boiling is somewhat the same as evaporation but due to heat energy differences differ.
Boiling process
Boiling is not a natural process as we have to supply energy for this process. Boiling only happens when we supply the proper amount of heat energy and the substance occupies its boiling temperature. The boiling process is not continuous as when we stop providing energy this process will stop suddenly.
From a destructive point of view, the boiling process is more destructive than the evaporation process. Evaporation is a surface phenomenon as water or any liquid present in its surface changes its state and the water content or liquid left inside the surface will be unaffected.
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