Without doing any calculations,determine whether the standard entropy change,ΔS° is positive or negative for each of the following reactions.
Reaction 1: S(s,rhombic) + O₂(g) → SO₂(g)
Reaction 2: 2 SO₂(g) + O₂(g) → 2 SO₃(g)

Question

Quizplus · Accepted Answer

In reaction 1, a solid and a gas form a gas, increasing disorder, so ΔS° is positive. In reaction 2, two gases form a single gas, decreasing disorder, so ΔS° is negative.

Without Doing Any Calculations,determine Whether the Standard Entropy Change,ΔS° Is