How many of the following processes would be exothermic (ΔH < 0)?
HCl(g) → H(g) + Cl(g)
Br(g) + Br(g) → Br2(g)
KI (s) → K + (g) + l - (g)
CO2(g) → CO(g) + O(g)
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Based on our data, we think this problem is relevant for Professor Shelton's class at Guilford Technical Community College.