Advertisements
Advertisements
Question
Name two ways of change of liquid state to the vapour state and distinguish them.
Answer in Brief
Distinguish Between
Advertisements
Solution
Two ways of change of liquid state to vapour state are:
- Evaporation
- Boiling.
DIFFERENCE BETWEEN EVAPORATION AND BOILING:
| BOILING | EVAPORATION |
|
(1) Heat is supplied. |
Heat is absorbed. |
| (2) Fast process. | Slow process. |
| (3) Starts from the bottom. | Starts form surface i.e. |
| (4) Sound is produced. | surface phenomenon Silent process. |
| (5) Heating effect | Cooling effect |
| (6) Takes place at a fixed temperature called the boiling point. | Takes place at all temperatures. |
shaalaa.com
Change of Liquid into Vapour State
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Evaporation takes place only from the surface of liquid.
Temperature of a liquid rises during boiling or vaporization
Boiling occurs at ....................
The molecules of liquid ............. heat from surroundings in evaporation.
Match the column
| Column A | Column B |
| (a) Blowing air increases | (1) Increase in intermolecular separation |
| (b) Increase in pressure increases | (2) Pendulum of a clock |
| (c) Thermal expansion |
(3) Cooking utensils |
| (d) Invar | (4) Boiling point |
| (e) Pyrex glass | (5) Evaporation |
In evaporation
The rate of evaporation of a liquid increases when:
The boiling point of a liquid is increased by
Why is cooling produced when a liquid evaporates?
Give reason for the increase in rate of evaporation of a liquid when surface area of liquid is increased.
