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Ammonia

Liquid ammoni...

Question

Liquid ammonia bottle is cooled before opening the seal. Why?

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Solution

The vapour pressure of ammonia at room temperature is very high and hence the ammonia will evaporate unless the vapour pressure is decreased.Cooling decreases the vapour pressure so that the liquid remains in the same state. Hence, the bottle is cooled before opening.

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Q. Explain the following.
(a) Liquid ammonia bottle is cooled before opening the seal.
(b) The type of an automobile is inflated to a slightly lower pressure in summer than in winter.

Q. Teacher wanted to open a liquid ammonia bottle in the laboratory. She cooled it before opening the seal. One of the students, Babita asked, is it necessary to cool down amminia bottle before opeinginthe seal. The teacher explained the reason and Babita got satisfied.'
a) What would be the explanation?
b) Why are aerated water bottles kept under water during summer?
c) What values are displayed by Babita?

Q. A bottle of liquor ammonia should be cooled before opening.

Q. A bottle of liquor ammonia should be cooled before opening. Give reason.

Explain each of the following observations:

(i) water bottles are kept under water during summer.

(ii) a bottle of liquid ammonia is cooled before opening the seal.

(iii) the size of weather balloon becomes larger and larger as it ascends into higher altitudes.

(iv) tyres of automobiles are inflated to lesser pressure in summer than in winter.

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