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27 August, 14:43

How does the reaction, A + BC ⇌ AB + C, differ from the reaction, N2 + 3H2 ⇌ 2NH3 + energy, by which ammonia is synthesized?

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  1. 27 August, 15:58
    0
    A is a single displacement reaction; B is a combination (synthesis) reaction.

    Explanation:

    The first reaction

    A + BC → AB + C

    This is a single displacement reaction, in which an element A displaces another element C from its compound BC.

    The second reaction

    N2 + 3H2 → 2NH3

    The coefficients don't matter in determining the type of reaction, so we can rewrite this equation as

    A + B → AB

    It then becomes more obvious that this is a combination (synthesis) reaction, in which two elements combine to form a compound.
  2. 27 August, 18:11
    0
    N₂+3H₂ ⇄2NH₃ is a thermochemical reaction whereas A+BC⇄AB is not.

    A+BC⇄AB is a reaction of pure a element with a compound while N₂+3H₂ ⇄2NH₃ is a reaction between two pure elements.

    Explanation:

    Let A+BC⇄AB be equation i and N₂+3H₂ ⇄2NH₃ be equation ii.

    The two reactions differ in that ii is a thermo-chemical reaction whereas i is not. This is because energy is included in reaction ii but not included in reaction i.

    Also i is a reaction of pure a element with a compound while ii is a reaction between two pure elements. The compound is BC while the pure element is A.
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