Which of the Following Has A $\Delta$ H°_f = 0 KJ/mol?
A)CO₂(g)
B)O₃(g)
C)Cl^-(aq)
D)NH₃(aq)
E)I₂(s)

Multiple Choice

Which of the following has a $\Delta$ H°_f = 0 kJ/mol?

A) CO₂(g)
B) O₃(g)
C) Cl^-(aq)
D) NH₃(aq)
E) I₂(s)