Which response includes all the following processes that are accompanied by an increase in entropy
1) 2SO₂(g) + O₂(g) $\rarr$ SO₃(g)
2) H₂O(l) $\rarr$ H₂O(s)
3) Br₂(l) $\rarr$ Br₂(g)
4) H₂O₂(l) $\rarr$ H₂O(l) + ¹/₂O₂(g)

Question

Which response includes all the following processes that are accompanied by an increase in entropy
1) 2SO₂(g) + O₂(g)

\rarr

SO₃(g)
2) H₂O(l)

\rarr

H₂O(s)
3) Br₂(l)

\rarr

Br₂(g)
4) H₂O₂(l)

\rarr

H₂O(l) + ¹/₂O₂(g)

Quizplus · Accepted Answer

Entropy increases when a system becomes more disordered or spread out. Processes 3 and 4 involve a change from a less dispersed state (liquid) to a more dispersed state (gas) and from a single phase to multiple phases, respectively, both of which increase entropy. Process 2, involving freezing, decreases entropy, and the formatting errors in option 1 make it unclear, but typically, gas reactions without a change in the number of gas molecules do not significantly change entropy.

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