Question

Given the following reactions, what is the overall reaction and the ∆H_rxn

2A + B → A2B	∆H° = – 25.0 kJ/mol
2A2B → 2AB + A2 AB2  → Α + 2Β	∆H° = 35.0 kJ/mol ∆H° = – 15.0 kJ/mol

		A) A + A2B →  AB + A2 ∆Hrxn = +5 kJ/mol
		B) 2A + B + 2A2B + AB2  → A2B + 2AB + A2 + A + B ∆Hrxn = -5 kJ/mol
		C) A + A2B →  AB + A3 ∆Hrxn = 75 kJ/mol
		D) A + A2B + AB2 → 2AB + A2 + B ∆Hrxn = -5 kJ/mol
		E) A + A2B + AB2 → 2AB + A2 + B ∆Hrxn = 75 kJ/mol

Answer 1

2A + B → A₂B                  ∆H° = – 25.0 kJ/mol

2A₂B → 2AB + A₂             ∆H° = 35.0 kJ/mol

AB₂  → Α + 2Β                 ∆H° = – 15.0 kJ/mol

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A + A₂B + AB₂ → 2AB + A₂ + B      ∆H_rxn = -5 kJ/mol

D) A + A₂B + AB₂ → 2AB + A₂ + B          ∆H_rxn = -5 kJ/mol   >>>>answer