Question

The process with negative entropy change is :

• A. Dissolution of iodine in water
• B. Synthesis of ammonia from $N_2$ and $H_2$
• C. Dissolution of ${CaSO4(s) }$ to ${CaO(s)}$ and ${SO3(g)}$
• D. Subimation of dry ice

Answer 1

Answer: (B)

Synthesis of ammonia from $N_2$ and $H_2$

Answer 2

${N2(g) + 3H2(g) <=> 2NH3(g) ; \Delta n_{g} < 0}$