Consider these reactions, where M represents a gen...

Question

Consider these reactions, where M represents a generic metal.

1. 2 M(s) + 6 HCl(aq) → 2 MCl₃(aq) + 3 H₂(g) ΔH₁ = -623.0 kJ

2. HCl(g) → HCl(aq) ΔH₂ = -74.8 kJ

3. H₂(g) + Cl₂(g) → 2 HCl(g) ΔH₃ = -1845.0 kJ

4. MCl₃(s) → MCl₃(aq) ΔH₄ = -309.0 kJ

Use the information above to determine the enthalpy of the following reaction

2M(s) + 3Cl₂(g) → 2MCl₃(s) ΔH = kJ

Jules Bruno · Accepted Answer

In this problem, we are asked to determine the enthalpy of the following reaction2 M(s) + 3 Cl2(g) → 2 MCl3(s)                               Consider these reactions, where M represents a generic metal. [readmore]1.)     2 M(s) + 6 HCl(aq) → 2 MCl3(aq) + 3 H2(g)             ΔH1 = – 623.0 kJ2.)     HCl(g) → HCl(aq)                                                     ΔH2 = – 74.8 kJ         6 HCl(g) → 6 HCl(aq)                                               ΔH2 = – 448.8 kJ3.)      H2(g) + Cl2(g) → 2 HCl(g)                                       ΔH3 = – 1845.0 kJ          3 H2(g) + 3 Cl2(g) → 6 HCl(g)                                 ΔH3 = – 5535.0 kJ4.)       MCl3(s) → MCl3(aq)                                               ΔH4 = –309.0 kJ           2 MCl3(aq) → 2 MCl3(s)                                         ΔH4 = + 618.0 kJ2 M(s) + 6 HCl(aq) → 2 MCl3(aq) + 3 H2(g)             ΔH1 = – 623.0 kJ6 HCl(g) → 6 HCl(aq)                                               ΔH2 = – 448.8 kJ3 H2(g) + 3 Cl2(g) → 6 HCl(g)                                  ΔH3 = – 5535.0 kJ2 MCl3(aq) → 2 MCl3(s)                                            ΔH4 = + 618.0 kJ---------------------------------------------------------------------------------------------------------------         2 M(s) + 3 Cl2(g) → 2 MCl3(s)                                 ΔHrxn = – 5991.8 kJ

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