Answer to Question #162044 in Physical Chemistry for Eden

Question

For which of the following reaction is ΔS negative ?

a. 2O​ 3 ​​(g)→3O​ 2 ​​(g)

b. 4Fe (s) + 3O 2 (g) → 2Fe 2 O.(s)

c. 2NH 3 (g) → N 2 (g) + 3H 2 (g)

Answer 1

ΔS is negative for B because in this reaction number of moles of gaseous substances decreases as the reaction occurs.