Advertisements
Advertisements
Question
Name two ways of change of liquid state to the vapour state and distinguish them.
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. |
APPEARS IN
RELATED QUESTIONS
Evaporation takes place only from the surface of liquid.
Boiling is a rapid phenomenon.
In evaporation
The rate of evaporation of a liquid increases when:
Do all the molecules of a liquid take part in evaporation? If not, explain your answer.
No heat is supplied to a liquid during evaporation. How does then the liquid change into its vapours?
Comment on the statement ‘evaporation is a surface phenomenon’.
Why is cooling produced when a liquid evaporates?
Give reason for the increase in rate of evaporation of a liquid when air is blown above the liquid.
Give reason for the increase in the rate of evaporation of a liquid when temperature of liquid is increased.
