Why on evaporation solid converts into liquid below its boiling point? Why not above?

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Solution

Dear student,
Evaporation is process in which the solid gets converted into liquid when the optimum temperature and pressure conditions are attained. A net reduction of free energy takes place. there is no extra energy required from outside.
In boiling, extra energy is required for the formation of bubbles of the liquid. So, due to the need of this extra energy, solid gets converted to liquid below its boiling point.

If the temperature is above the boiling point, the process will be called vaporization and not evaporation.

Regards

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Similar questions

Below the boiling point of a liquid evaporation takes place. Then when the liquid is being heated to vaporise it, before reaching its boiling point does the liquid not evaporate?

Q. The process of a liquid changing into vapour even below its boiling point is called evaporation.

The process through which a liquid converts into vapor below its boiling point is called________

Select the correct alternative:

(a) The inter-molecular force is maximum in :

(i) solids (ii) gases

(iii) liquids (iv) none of the above.

(b) The inter-molecular space is maximum in :

(i) liquids (ii) solids

(iii) gases (iv) none of the above.

(i) gases (ii) liquids

(iii) solids (iv) none of the above

(d) The molecules move only within the boundary of :

(i) liquids (ii) gases

(iii) solids (iv) none of the above

(e) The temperature at which a liquid gets converted into its vapour state is called its :

(i) melting point (ii) boiling point

(iii) dew point (iv) freezing point

(f) Rapid conversion of water into steam is are an example of:

(i) evaporation (ii) freezing

(ii) melting (iv) vaporization

(g) Evaporation takes place from the :

(i) surface of liquid

(ii) throughout the liquid

(iii) mid-portion of the liquid

(iv) bottom of the liquid

(h) Boiling takes place from:

(i) the surface of the liquid

(ii) throughout the liquid

(iii) mid-portion of liquid

(iv) none of the above

Explain, why an organic liquid vaporises at a temperature below its boiling point in its steam distillation?

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