# Difference Between Evaporation and Other Heat Process

## 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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