Combination Reactions

In a combination reaction the atoms and/or molecules do what the name implies: they combine to form the product. Combination reactions are always exothermic. For example barium metal and fluorine gas will combine in a highly exothermic reaction to form the salt barium fluoride:

Another example is given by magnesium oxide combining with carbon dioxide:

Often, reaction can fall into more than one category. For example the combustion of magnesium metal is also a combination reaction:

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C101 Class Notes
Prof. N. De Leon