Question

which reactions has a negative change in entropy.
I. 2 HgO(s) → 2 Hg(l) + O2(g)
II. Ba2+(aq) + SO42­(aq) → BaSO4(s)
III. 2 H2O2(l) → 2 H2O(l) + O2(g)

Answer 1

Answer:

it's the second option

Ba2+SO42--->BaSO4

hope it helps