Evaporation

Question and answers :

1.) What is evaporation ?

Answer :- Evaporation can be defined as changing the liquid state of water into gaseous state with the help of heating, called as evaporation.

2.) What are the materials needed for evaporation experiment ?

Answer :- Bunsen burner, evaporating dish, water and salt.

3.) Can you explain evaporation experiment ?

Answer :- 1.) Collect the materials required for experiment.

2.) Take Bunsen burner, evaporating dish, water and salt.

3.) Place the evaporating dish on Bunsen burner and add water and salt in evaporating dish.

4.) Heat the Bunsen burner, till water starts evaporating.

5.) Stop the heating when evaporating dish have no water to evaporate.

4.) What is the aim of evaporation experiment ?

Answer :- Separation of solid and liquid state.

Evaporation can be defined as changing the liquid state of water into gaseous state with the help of heating, called as evaporation. Now as given in diagram we take mixture of salt and water, here we are concern with evaporation means liquid water will evaporate in the form of vapors and salt will remain in evaporating dish. This evaporation method can be used to separate liquid state from solid state.

Procedure :

1.) Collect the materials required for experiment.

2.) Take Bunsen burner, evaporating dish, water and salt.

3.) Place the evaporating dish on Bunsen burner and add water and salt in evaporating dish.

4.) Heat the Bunsen burner, till water starts evaporating.

5.) Stop the heating when evaporating dish have no water to evaporate.

Activity :

If we take a glass of water and keep this glass of water in refrigerator for some time and after a time we remove the glass from refrigerator and keep on table, then after specific time we will observe that water droplets come outside and table surface also get wet, if same glass of water if we place under sun heat then water will release in form of gas, that is called as evaporation.

Diagram of evaporation

Conclusion : From evaporation experiment, we separate the solid, liquid and gaseous states of water with the help of heating.


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