Q.
In which of the following processes, entropy increases?
(I) A liquid crystallizes into a solid
(II) Temperature of a crystalline solid is raised from $0 \,K$ to $115 \,K$
(III) $2NaHCO_{3(s)} \to Na_{2}CO_{3(s)}+CO_{2(g)}+H_{2}O_{(g)}$
(IV) $H_{2(g)} \to 2H_{(g)}$
Thermodynamics
Solution: