Examples of Combination Reaction
A + B → AB
Such reactions involve the combination of two or more substances but form only one substance as the final product. For example; the combination of iron and sulphur results the formation iron (II) sulphide as given below;
- Reaction between elements.
- Reaction between elements and compounds.
- Reaction between compounds.
The combination of two non-metals forms covalent compounds such as combination of solid sulphur and oxygen gas forms sulphur dioxide gas.
The combination reaction of oxygen molecule with carbon monoxide gas forms carbon dioxide. It is an example of combination of elements and compounds.
Similarly the combination of two compounds can form a new compound such as combination of calcium oxide with carbon dioxide gas forms calcium carbonate.
Some of the combustion reactions are also example of combination reaction such as combustion of coal or hydrogen in the presence of oxygen result the formation of carbon dioxide and water respectively. Both are example of combination reactions.
Formation of sulphuric acid form the combination of sulphur trioxide and water is also a combination reaction which is again highly exothermic reaction.
Formation of black ferrous sulphide form solid iron and sulphur is also a combination reaction.
Another example of combination reaction is Heber’s process which involves the combination of nitrogen and hydrogen gas to form ammonia.
Similarly combination of aluminium with oxygen forms aluminium oxide and combination of potassium with chlorine gas forms potassium chloride.