Scientific Tutor

Without looking at an entropy table, are these chemical equations below increasing or decreasing in entropy (Δ S). based on their state?

H₂O_(s) —> H₂O_(l)

Answer: Increasing (s —> l)

2 Fe³⁺_(aq) + 3 CO₃^2-_(aq) <—-> Fe₂(CO₃)_3(s)

Answer: Decreasing (aq —-> s)

6 Ag_(s) + Ca₃(PO₄)_2(s) <——> 3 Ca_(aq) + 2 Ag₃PO_4(s)

Answer: Increasing (s —> aq)

4 CO_2(g) <—-> C_4(s) + 4 O_2(g)

Answer: Decreasing (g —> s)

N_2(g) + 3 H_2(g) <—-> 2 NH_3(g)

Answer: Not increasing or decreasing (g —> g)