Predict the sign of Delta S system for each of the following reactions or processes

**the numbers in brackets are supposed to be subscripts**
a.) 2H[2]S[(g)] + 3O[2(g)] ----> 2H[2]O[l] +2SO[2(g)

b.)FeS[s] ---->Fe^(2+)[aq] +S^(2)[aq]

c.) ClF[g] + F[2(g)] ----> ClF[3(g)]

A: 5 moles of gas → 2 moles of gas, disorder decreases, ΔS is negative.

B A solid dissociate into ions, disorder increases, ΔS is positive

C: 2 moles of gas → 1mole of gas, disorder decreases, ΔS is negative.

you can ignore writing the [ ] around the subscripts as people here generally know what it means when H2S is written...
a. ∆S -, there is more entroy in 5 moles of gas (reactants) than 2moles of gas and 2moles of liquid
b. ∆S +, there is more entropy in 2 moles of ions than in 1 mole of a solid
c. ∆S -, there is more entrpy in 2moles of gas (reactants) than in 1 mole of gas (products)