Macmillan Learning Given the thermochemical equations X₂ + 3 Y₂ → 2XY3 X₂ +2Z₂ → 2XZ₂ 2Y₂+Z₂2Y₂Z Calculate the change in enthalpy for the reaction. 4XY3 +7Z₂6Y₂Z + 4XZ₂ AH = AH₁ = -370 kJ AH₂ = -130 kJ AH3-220 kJ kJ

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