Why are decomposition reactions are called opposite of combination reactions?Write equations for these reactions.

Asked by Soumi Mondal | 6th Jun, 2015, 12:21: PM

Expert Answer:

In decomposition reactions a single substance decomposes to form two or more substances.
 
begin mathsize 12px style C a C O subscript 3 space rightwards arrow with H e a t space on top space C a O space plus space C O subscript 2 end style
In combination reaction in two or more reactants combine to form a single product.
 
CaO + CO2 → CaCO3 + Energy
 
From above examples, it is clear that the two reactions are exactly opposite to each other because of that, decomposition reactions are called opposite of combination reactions

Answered by Arvind Diwale | 6th Jun, 2015, 01:38: PM