Choose Reactions That Are Exothermic

Question

Circle which of the following reactions are exothermic

1. 2Mg(s) + O₂(g) → 2MgO(s)                                       ΔH = -1203 kJ/mol

2. NH₃(g) + HCl(g) → NH₄Cl(s)                                    ΔH = -176 kJ/mol

3. AgCl(s) → Ag⁺(aq) + Cl^-(aq)                                      ΔH = 127 kJ/mol

4. 2Fe₂O₃(s) + 3C(s) → 4Fe(s) + 3CO₂(g)                      ΔH = 468 kJ/mol

5. C(graphite) + O₂(g) → CO₂(g)                                   ΔH = -393.5 kJ/mol

6. CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l)                       ΔH = -891 kJ/mol

Summary

The question belongs to Chemical Engineering and it discusses about choosing reactions that are exothermic.

Total Word Count 66