The second type of reaction, decomposition, can also be referred to as
analysis. This means the breakdown of a compound to release its components as
individual elements or other compounds. Some examples of this type are:
The third type of reaction is called single replacement or single
displacement. This type can best be shown by examples in which one substance
is displacing another. Some examples are:
The last type of reaction is called double replacement or double
displacement because there is an actual exchange of “partners” to form new
compounds. Some examples are:
PREDICTING REACTIONS
One of the most important topics of chemistry deals with the reasons why
reactions take place. Taking each of the above types of reactions, let us see how a
prediction can be made concerning how the reaction gets the driving force to
make it occur.
TIP
−ΔH = exothermic reaction
+ΔH = endothermic reaction