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ICSE Class 8 Answered

explain the folliwing on the basis of the kinetic theory a)  boiling b)melting c)CONDENSATION
Asked by nathsantanukumar | 22 Mar, 2018, 01:28: PM
answered-by-expert Expert Answer
a) Boiling: 

On heating liquids, the temperature rises.

Particles gain energy.

The intermolecular force of attraction decreases.

Intermolecular space between the molecules of liquid increases.

At boiling point, particles become completely free and convert into a gas/vapour.
 
b) Melting:

On heating solids, the temperature rises.

Particles gain energy.

The intermolecular force of attraction decreases.

Intermolecular space between the molecules of solid increases.

At melting point, particles of solid become free from a fixed position and get converted into a liquid

c) Condensation:
Condensation is the change of the physical state of matter from the gas phase into a liquid phase and is the reverse of vaporisation.
Answered by Ramandeep | 22 Mar, 2018, 03:56: PM

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