Question

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?

Answer 1

$a)$ The vapour pressure of liquid ammonia at room temperature is very high and hence , $N{H}_3$ will evaporate cooling decreases vapour pressure, a bottle is cooled before opening.

$b)$ In summer solubility of gas in water is likely to decrease. to avoid this, bottles are kept under water.