Which of the Following Reactions Has the Smallest Value Of \Delta

Multiple Choice

Which of the following reactions has the smallest value of $\Delta$ S ^$\circ$ ?

A) NH₃(g) + HCl(g) $\rarr$ NH₄Cl(s)
B) 2H₂(l) + O₂(l) $\rarr$ 2H₂O(g)
C) N₂(g) + 3H₂(g) $\rarr$ 2NH₃(g)
D) K(s) + O₂(g) $\rarr$ KO₂(s)
E) BaCl₂.2H₂O(s) $\rarr$ BaCl₂(s) + 2H₂O(g)