AP Chemistrymediummcq1 pt
Which of the following has ΔH°_f = 0?
A.Br₂(l)
B.Br₂(g)
C.C(diamond)
D.O₃(g)
Explanation
Core Concept
Bromine's standard state is the liquid — the stable form at 1 atm and 25 °C — so its ΔH°_f is defined as zero.
Correct Answer
ABr₂(l)
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