Table.1: Difference between Vaporization and Evaporation
Vaporization
(Boiling) |
Evaporation |
(i)
It is a process in which a substance changes its state from the liquid state
to the gaseous state with boiling. |
(i)
It is a process in which a substance changes its state from the liquid state
to the gaseous state without boiling. |
(ii)
It is a fast process. |
(ii)
It is a slow process. |
(iii)
Bubbles are formed while vaporization. |
(iii)
No bubbles formed during evaporation. |
(iv)
Occurs throughout the liquid. |
(iv)
Takes place only from the exposed surface of the liquid. |
(v)
Vaporization does not depend on the surface area of the liquid. |
(v)
Evaporation depends on the surface area of the liquid. |
(vi)
It occurs at a definite temperature i.e. at boiling point. |
(vi)
It occurs at all temperatures. |
(vii)
Heating source of energy is needed. |
vii)
Energy is supplied by surroundings. |
Table.2: Difference between Distillation and Evaporation
Distillation |
Evaporation |
(i)
Distillation is a process of separating the component substances from a
liquid mixture by selective evaporation and condensation. |
(i)
Evaporation is a type of vaporization of a liquid that occurs from the
surface of a liquid into a gaseous phase. |
(ii)
In the distillation, vaporization takes place at the boiling point |
(ii)
In evaporation, vaporization takes place below the boiling point. |
(iii)
Distillation is taking place from the whole liquid mass. |
(iii)
Evaporation takes place only from the surface of the liquid. |
(iv)
At the boiling point in distillation the liquid forms bubbles. |
(iv)
No bubble formation in evaporation. |
(v)
Distillation is a separation or purifying technique. |
(v)
Evaporation is not necessarily the separation or purifying technique. |
(vi)
In distillation, heat energy should be supplied to liquid molecules to go into
the vapor state. |
(vi)
In evaporation, molecules get energy when they collide with each other and are
used to escape to the vapor state. |
(vii)
In distillation, vaporization happens rapidly. |
(vii) The evaporation is a slow process. |
(viii)
It involves boiling and condensation. |
(viii) It involves only evaporation. |
(ix)
Process of purification and separating components with fractional
distillation based on boiling point. |
(ix) Process of purification and
separating components without fractionation independent of boiling point. |
Table.3: Difference between Drying and Evaporation
Drying |
Evaporation |
(i) Drying is the removal of water from
a substance. |
(i)
Evaporation is the changing of the phase of liquid water to gaseous water. |
(ii)
It is possible to dry a substance without evaporation. For example, using
air, adsorbent, absorbent, and freeze-drying. |
(ii)
Evaporation is a physical phenomenon that may form part of the mechanisms
that affect such a change, but there are others too. |
(iii)
Separation of moisture content from any type of biological, chemical, and
metallurgical materials due to temperature gradient. |
(iii)
In evaporation the surface molecules skip to the atmosphere by gaining extra
energy, especially in the form of heat.
|
(iv)
Drying follows evaporation. |
(iv)
Evaporation results in drying. |
(v)
Drying is the process of removing moisture from any object. Drying can occur
due to evaporation as well as external factors such as wind. |
(v)
Evaporation is a process in which the surface molecules skip to the
atmosphere by gaining extra energy, especially in the form of heat. |
(vi)
Drying is the evaporation or conversion of water molecules to the gaseous
state for more stability. |
(vi)
Evaporation takes place in all liquids content, when left in open, tend to
lose its water usually to atmospheric air. |
(vii)
Drying is the removal of traces of water from the material by just sending hot
dry air over it. |
(vii) In evaporation mass of liquid at
room temperature loses some of the water in it to the adjoining environment. |
(viii)
Drying involves the removal of volatile matter by evaporation. In short
drying, the mass transfer takes place using the evaporation process. |
(viii) Evaporation is the process to
concentrate the slurry of solid by removal of volatile matter. It is a heat
transfer operation. |
Table.4: Difference between Sublimation and Evaporation
Sublimation |
Evaporation |
(i)
Phase change is from solid to gas. |
(i)
Phase change is from liquid to gas. |
(ii)
No liquid state involves in this process. |
(ii)
In this liquid is involved. |
(iii)
It involves solid as starting material. |
(iii)
It involves liquid as starting material. |
(iv)
Requires external energy equal to achieve sublimation. |
(iv) Requires external energy equal to
achieve evaporation. |
(v)
Example: Camphor, iodine. |
(v)
Example: Water to vapor. |
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