Types of Chemical Reactions III

Topic Content:

7. Reversible Reaction:

A reversible reaction is a reaction which can be made to proceed in either direction under suitable conditions.

\( \scriptsize A \: + \: B \leftrightharpoons C \: + \: D \)

The symbol \( \leftrightharpoons \)is a reversibility sign 

Example:

[a] Action of Steam on red-hot iron 

\( \scriptsize 3Fe_{(s)} \: + \: 4H_2O_{(g)} \leftrightharpoons Fe_3O_4 \: + \: 4H_{2(g)} \)

[b] Water and Steam exists in equilibrium at boiling

\( \scriptsize \underset {Water}{H_2O_{(l)}} \scriptsize \leftrightharpoons \underset {Steam}{H_2O_{(g)}}\)

8. Thermal