When a small ice crystal is placed in overcooled water it begins to freeze instantaneously.
i. What amount of ice is formed from 1 kg of water over cooled to `-8^@C` ? L of water `=336xx10^3 J//kg` and s of water`=4200 J//kg//K`.
ii. What should be the temperature of the overcooled water in order that all of it be converted into ice at `0^@C` ?

Explanation

The small ice crystal acts as the centre of condensation and so water begins to freeze instantaneously.
`mL=Mc{0-(-t)}=Mct`
or `m=(Mct)/(L)=(1xx4200xx8)/(336xx10^3)kg=100g`
Now `ML=Mctimpliest=(L)/(c )=(336xx10^3)/(4200)=80^@C`