Predict the sign of ΔS° for each of the following reactions.

Question

a) CCl4(l) + 5O2(g) --> CO2(g) + 4ClO2(g)

b) 8H2O(l) + S8(s) --> 8H2S(g) + 4O2(g)

c) Br2(l) --> Br2(s) 

d) 2NH3(g) --> N2(g) + 3H2(g)

Answer 1

a) CCl4(l) + 5O2(g) --> CO2(g) + 4ClO2(g) ∆S = +

b) 8H2O(l) + S8(s) --> 8H2S(g) + 4O2(g) ∆S = +

c) Br2(l) --> Br2(s)  ∆S = -

d) 2NH3(g) --> N2(g) + 3H2(g) ∆S = +