AP Chemistrymediummcq1 pt
Which reaction has a positive ΔS°?
A.2H₂O₂(l) → 2H₂O(l) + O₂(g)
B.N₂(g) + 3H₂(g) → 2NH₃(g)
C.H₂O(g) → H₂O(l)
D.2CO(g) + O₂(g) → 2CO₂(g)
Explanation
Core Concept
A gas forms where none existed, increasing particle dispersal and the number of moles (2 → 3). More gas moles on the product side is the standard ΔS° > 0 signature.
Correct Answer
A2H₂O₂(l) → 2H₂O(l) + O₂(g)
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