Chemistry

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Write the balance equation and the reaction type when magnesium is added to HCl

  • Chemistry -

    2HCl + Mg ==> MgCl2 + H2
    Looks like a single replacement reaction to me. Mg replaced H2.

  • Chemistry -

    When a covalent bond is formed between 1 mole of atoms A and 1 mole of atoms B, the overall energy of these atoms decreases and heat is released into the surroundings.

    i. Is the process of a covalent bond formation exothermic or endothermic?
    ii Is the change of enthalpy for the formation at constant pressure of a mole of covalent bonds between A and B positive or negative? Why?

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