why are decomposition reactions called the opposite of combination reactions write equation for this reaction
Dear student,
Those reactions in which two or more substances combine to form a single substance , are called addition or combination reactions. For example : C(s) + O2(g) → CO2 (g) 2 SO2(g) + O2 (g) →2SO3 (g)
Those reactions in which a compound splits up into two or more simpler substances are known as decomposition reactions. The decomposition reactions are carried out by applying heat, light or electricity.
For example : CaCO3(s) →heat CaO(s) + CO2(g)
2 Pb(NO3)2 →heat2 PbO (s) + 4 NO2(g) + O2(g)
Thus as seen from above examples in addition reactions two or more substances add up to give a single product. Whereas decomposition is exactly opposite to this where a single substance splits into two or more products. Thus because of the opposite nature of the two reactions addition reactions are called opposite of decomposition reactions.
Regards
Those reactions in which two or more substances combine to form a single substance , are called addition or combination reactions. For example : C(s) + O2(g) → CO2 (g) 2 SO2(g) + O2 (g) →2SO3 (g)
Those reactions in which a compound splits up into two or more simpler substances are known as decomposition reactions. The decomposition reactions are carried out by applying heat, light or electricity.
For example : CaCO3(s) →heat CaO(s) + CO2(g)
2 Pb(NO3)2 →heat2 PbO (s) + 4 NO2(g) + O2(g)
Thus as seen from above examples in addition reactions two or more substances add up to give a single product. Whereas decomposition is exactly opposite to this where a single substance splits into two or more products. Thus because of the opposite nature of the two reactions addition reactions are called opposite of decomposition reactions.
Regards