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ICSE Class 8 Physics Question 2 of 19

Heat Transfer — Question 2

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Question

Question 2

Distinguish between liquid and vapour (or gas) states of matter on the basis of the following factors:

(a) Arrangement of molecules

(b) Inter-molecular separation

(c) Inter-molecular force and

(d) Kinetic energy of molecules

Answer
PropertyLiquidsGases
Arrangement of moleculesMolecules are not rigid and they are less closely packedMolecules are very loosely packed
Inter-molecular separationThe inter-molecular spaces are more than solidsThe inter-molecular space is very large as compared to solids and liquids
Inter-molecular forceThe force is weak and molecules are free to move within the boundary of the containerThe force is very weak so molecules are free to move anywhere
Kinetic energy of moleculesThe kinetic energy is more than solidsKinetic energy is the most in gases.