ICSE Class 7 Answered
differentiate between the following
liquids and gases
melting and vaporisation
freezing and condensation
Asked by sunita.indwar74 | 08 Apr, 2018, 05:08: PM
Expert Answer
1) Liquids and gases:
| Characteristic | Liquid | Gases |
|
Arrangement of
atom
|
Not closely packed | Far apart |
|
Force of attraction
between atoms
|
Less strong | very weak |
| Volume | Definite volume |
No definite volume
|
|
Movement of
atom
|
Move in continuous
motion
Movement less than
solids
|
Moves in any random
direction
Free movement
|
2) Melting and vaporisation:
| Melting | Vaporisation |
|
1.It is the process in which a solid change to its liquid state
at a constant temperature by absorption of heat.
|
1. It is the process in which a liquid change to its gaseous state
at a constant temperature by absorption of heat.
|
|
2.The temperature at which melting occurs is known as
the melting point of the solid.
|
2. The temperature at which boiling occurs is known as
boiling point or vapourisation point of the solid.
|
3) Freezing and condensation:
| Freezing | Condensation |
|
Freezing point is the temperature at which liquid changes to solid
under atmospheric pressure.
|
Condensation is a process in which water collects as droplets
on a cold surface when humid air is in contact with it.
|
| Freezing occurs at a very low temperature | For condensation it needs just a cold surface. |
Answered by Ramandeep | 08 Apr, 2018, 07:00: PM
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