Which of the following is proved by the experimental demonstration
a) Air exerts pressure: Yes/No
b) Water vapour exerts pressure: Yes/No
Justify your answer:
a)
b)
Answers
Answer:
Yes
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Answer:
Both air and water vapour exert pressure.
Explanation:
In the experiment, a tin can is taken and filled with some water. The can is heated by using a burner to boil the water so that steam is formed.
When water is boiling, this steam purges the entire can of air, leaving just steam within. As a result, the entire can is filled with steam.
The heating is halted after the lid is tightly fitted to the tin can. On the hot tin can, we are now pouring cold water from a faucet.
The tin can collapses inward when cold water is poured into it, as though it had been crushed by a powerful outside force.
In the tin can, steam is created when the water boils. Pressure exists in steam. In order to prevent the tin can from being crushed, the steam pressure operating from inside the can balances the air pressure (or atmospheric pressure) pushing on all of its sides from the outside.
The heated steam within the tin can cools, condenses, and creates water and water vapour at very low pressure when a tight cork is placed on the mouth of the can and cold water is poured over it. The pressure within the tin can drops too much as it cools, making it unable to counteract the strong external air pressure.
Air exerts pressure: Yes
Water vapor exerts pressure: Yes.
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