Give reasons:
a. Acetone when rubbed on palm gives a cool feeling.
b. Gas fills the container in which it is stored.
c. On a foggy morning you find droplets of water on the glass of your school bus.
d. People sprinkle water on the roof tops during summers.
e. Ice at 0 degree C is colder than Ice cold water at 0 degree C.
f. Water kept in earthen pots becomes cool during summers.
g. A diver can dive and cut through the water in swimming pool.
h. Diffusion is fastest in case of gases.
Answers
Answer:
A) Acetone needs heat to evaporate itself so it takes the heat from a palms to get evaporated therefore we get a cool feeling when it is in our hands.
B) gases have least attraction force between their atoms so why gas is stored in closed containers and the occupy the full container.
C) I will take a example of a bottle let's places this bottle inside a refrigerator and after a while when we keep this bottle out of the refrigerator we find small droplets in it in the same way applies for bus this is due to that when it is placed out of the cold area it interacts with the water molecules which is in the air and results in forming droplets
D) As it was said in answer A when water is sprinkled over the rose in summer the sun rays will first wants the vapour to be evaporated so this all sunraisers energy will go for evaporating water and then one little affect the Rope causing heat to the the member down there therefore the Sprinkle the water over the roof
E) as stated in the question is solid and ice water is liquid therefore ice takes a lot of time to melt the ice water because solid takes much of the time to melt as it has large amount of force of attraction between the atoms and therefore ice at 0 degree Celsius is colder than Ice cold water at 0 degree
F) earthen pots have pores in their surface source most of the times the water comes out Through The pores in order to evaporate this water it needs heat and this heat is taken from the Earthen pots water and therefore it becomes cold
G) it is so because the attraction force between the atoms is very less so that the diver can Dive In The Water easily
H) yes diffusion is fastest in the case of gases because it was already stated that the attraction force between the molecules is very less so diffusion is very very easier in the state of gas as compared to solid and liquid
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Answer...
1) Because when it is rubbed on the palm it get percipitated and evaporated so a cool feeling is experienced by us.
2) because the particles of gas are independent , so can move every where as they like so ,they fill the container in which they are stored.
3) they are because when the heat from the inner surface is pushed outwards it gets evaporated so we see some mist fallen on our Bus glass.
4) because as water will be precipitated, it give coolness in the room.
5) because when he cuts the water the force is applied and the water gets diverted to the another direction...
6) because it ,the earthen pot never allow the heat to be evaporated..
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