In which of the following processes does entropy increase?(A) Liquid evaporating to vapor.(B) Lowering the temperature of a gas.(C) Decomposition of ${\text{NaHCO}}_3(s)$ to ${\text{Na}}_2{\text{CO}}_3(s)$, ${\text{CO}}_2(g)$, and ${\text{H}}_2\text{O}(g)$.(D) Dissociation of ${\text{Cl}}_2(g)$ into $2\text{Cl}(g)$.

Entropy is a measure of randomness or disorder.(A) Liquid to vapor: Randomness increases significantly. ($\Delta S>0$)(B) Lowering temperature: Kinetic energy and randomness decrease. ($\Delta S<0$)(C) Solid decomposing into solid and gases: Number of moles of gas increases. ($\Delta S>0$)(D) One mole of gas dissociating into two moles of gas: Number of particles increases. ($\Delta S>0$)