TS EAMCET 14-Sep-2020 Shift 1 Solved Paper

(b)

H2O(l)

Water

⟶

H2O(s)

Ice

⇒ degree of randomness of H2O molecules decreases, when freezing of water into ice takes place,
⇒‌‌∆S<0
(c) With increase in temperature, KE of H2O molecules of ice also increase. So, ∆S>0.
Here, ∆ng>0⇒∆S>0
So, entropy decreases when liquid water crystallises into ice.